A comprehensive guide to blockchain and its uses

A comprehensive guide to blockchain and its uses

You have probably heard of “blockchain technology” when talking about cryptocurrencies such as Bitcoin. Blockchain will likely grow and become easier to use in the coming years. 

When answering “What is blockchain technology?” we should talk about how it works, what it can be used for, what its pros and cons are, and how it is becoming increasingly important in the digital world. We’ll answer these questions and more below:

What is blockchain, and how does it work?

A blockchain is a public or open digital ledger that stores a record of transactions or data on a network of computers. It can’t be changed as well as the transactions and files that have been recorded. 

Two of the essential things about blockchains are that they can’t be changed and don’t have a central authority. Since the ledger is hard to change, you can always trust its information is authentic. It is hard to attack a blockchain network since it is decentralized.

How does blockchain work?

The blockchain is a system that keeps track of records of transactions in a block. Every transaction in this digital ledger needs the digital signature of the owner. This signature proves that the deal is real and keeps it from being changed. So, there is a lot of protection for the data in the blockchain.

The blockchain works in a series of steps that can be different depending on the consensus mechanisms used. For example, Bitcoin uses Proof of Work (PoW) to verify transactions and add them to the blockchain. The process of mining Bitcoin can be broken down into these steps:

Step 1: There will be a transaction in the blockchain

When you send Bitcoin, you have to pay a fee (also called a “gas fee”) so that a computer network can check your transaction’s legitimacy.

Step 2: The blockchain will start making sure the transaction is genuine

As soon as the transaction is complete, the blockchain will check to see if it is accurate. Your transaction will be added to a new block with those of other users whose requests are currently in a queue.

Step 3: A block will be made

A block will be made to represent the chosen transaction or data. The blockchain stores records and transactions in a unit called a “block.” For example, one block usually has more than 500 Bitcoin transactions on the Bitcoin blockchain.

The information in each block depends on the information before it is linked to it. This leads to a chain of transactions over time. Thus, the name “blockchain.”

Step 4: The miners will receive the block

The block will be sent to each computer node that is part of the network. Miners are the nodes in public blockchain networks, such as Bitcoin.

Step 5: Miners will try to confirm that the transaction is valid

The miners will then try to confirm the transaction by solving complicated cryptographic puzzles to make a hash. Whoever solves the complex cryptographic puzzle first will get mining rewards.

A hash is a 64-digit number written in hexadecimal. No matter how big the file is, the hash code length will always be the same. Once the hash is made, the subsequent blocks in the blockchain will use the hash from the last block to make their hash.

Using cryptography, the hash is added to the block. You must first enter the key and information from the last block to do this. A cryptography key comprises two parts: the Private Key and the Public Key.

Cryptographic keys help ensure that transactions between two parties are completed successfully. They also ensure that if someone tries to change data, there will be a chain reaction that alerts the network immediately.

Step 6: The block will be added to the chain

When the authorized nodes approve the transaction, the block is added to the blockchain. At this point, most of the network’s nodes must agree that the new block’s hash was calculated correctly.

Each block in the chain has some information from the block before it. So, if you try to change or delete data in one block, you will have to change all of the blocks. This is risky for hackers because if they change the data, everyone in the network will know about that change.

Once the update has been sent to all the network nodes, the transaction is done. This mining process makes the blockchain more secure and more challenging to change already existing blocks.

How blockchain is used

With blockchain, you don’t need a third party like a bank to move money across borders. This makes the process faster and cheaper.

In the same way that the internet made it possible to send emails, blockchain technology enabled cryptocurrencies like Bitcoin to work. But it can also be used for many things other than cryptocurrencies.

When you store data in a blockchain, no one can change, hack, or do anything else to your physical or digital assets. Intangible assets are things like patents, intellectual property, and copyrights. On the other hand, tangible assets include homes, cash, cars, and land.

Blockchain technology makes cryptocurrencies, digital tokens, and NFTs, possible, but it also has a lot of other possible uses in other fields. Check out some of them here:


In the financial sector, blockchain technology is also being used more and more. Financial companies have been putting more money into blockchains to make it easier to keep track of payments and their records.

For example, financial companies like Barclays, Canadian Imperial Bank, and UBS are interested in how blockchain technology could make their back-office settlement processes more efficient.

Supply Chains

The trades on a blockchain make it possible to look up a product’s history. Blockchain is now being used to discover where valuable metals and foods came from.

For example, Walmart and IBM worked together to make a system for tracking the food that uses open-source ledger technology. This system makes it much easier to find food that might be spoiled or contaminated.


By using blockchain technology, healthcare processes can be made more efficient. Blockchain can decrease the time it takes to pay health insurance claims to patients. It can also be used safely to store, share, and send medical data and records. Patients can also keep their privacy and fully control their medical records.


The information stored on a blockchain could lead to election results that can’t be changed.

Records of property

If land records are kept on a blockchain, it may be possible to lower the costs of title searches and insurance. It could also help show ownership and determine who owns the property quickly.

On the blockchain, records of who owns a piece of property can be encrypted and checked at any time to make sure they are correct. You can be sure that the information in these documents is correct because they can’t be changed in any way.

Tracking system

Since each transaction on the blockchain is recorded and leaves a trace that can’t be changed, it’s much easier for the government to figure out where the money came from in the first place if it’s been laundered.

Automatic ad campaigns

Advertisers can use smart contracts and blockchain technology to automate ad campaigns. For instance, they can’t show an ad to a group of people until certain conditions are met. This makes it easier for advertisers to reach the right people.

NFT markets

Non-fungible tokens (NFTs) sales took off in 2021. Because of this, more and more people began to use blockchain technology. NFTs are digital assets that stand for things, works of art, songs, videos, and many other things. They can be bought, sold, and traded over the internet and have become a standard way to buy and sell digital art.

Why using blockchain technology is a good idea

People say there are several important reasons to use blockchain technology. Here are some of the things that could be good about using blockchain:

Clear and safe data

The most important benefit of blockchain is that people can feel safe. Since millions of computers are constantly checking the information on a blockchain and exchanging it, it is almost impossible to exploit data.

Fast business deals

Since transactions don’t have to go through intermediaries like banks, blockchains may be more efficient.

Resistance to errors

Every computer node will have a copy of the ledger, so if one node fails, it won’t affect how the network works.


Blockchains save money because they eliminate the need for intermediaries and third parties. As a result, there are fewer costs associated with the transaction.

Peer-to-peer exchange

Cryptocurrencies like Bitcoin, Ethereum, and others let you send money directly to anyone, anywhere in the world, without going through an intermediary like a bank, which would charge you fees for the transaction or handling.


Since open-source software is used for public blockchains, anyone can access them and look at the transactions and the source code. They can even use the code to make their apps and suggest how the code could be made better.

Universal Banking

Over 2 billion people in the world do not have a bank account. Since anyone can use the blockchain to store money, it is a great way to help people who don’t have bank accounts and protect against theft, which can happen when money is kept in physical locations.

What can go wrong when you use blockchain technology

The blockchain can’t be changed, making it easy for people who don’t know each other to do business. Because of this, blockchains are sometimes called “trustless” technology.

However, many experts believe blockchain may also have risks, problems, and downsides. Concerns have been raised about who owns public blockchains and who is to blame if something goes wrong.

Changing the information in a blockchain often takes time and work. Also, the amount of space that can be stored can grow a lot over time. This puts the network at risk if the blockchain gets too big for people to download. Other issues are:


Once the conditions programmed into a blockchain protocol have been met, a transaction that has already started cannot be undone, changed, or stopped. It is going to happen, and nothing—not a bank, not the government, not a third party—can stop it.

Environmental impact

A lot of electricity is needed to verify transactions on blockchain networks like Bitcoin, which is terrible for the environment. Bitcoin, for example, uses more electricity than a small or medium-sized European country.

Despite this, several people believe Bitcoin is held to more significant environmental standards than anyone or anything else. A study found that Bitcoin mining uses much less energy than traditional banking systems.

Individual obligation

The greatest things about blockchain technology and cryptocurrencies is also some of their biggest problems. When you buy cryptocurrencies as an investment, you put them in your crypto wallet. Your wallet is like your bank account, but only you know the passwords and can access it.

So, you are the only one who can decide what to do with your money. This could be a perfect place to be. But you can’t get your wallets back if you lose your seed phrases, a list of words that give you access to them. 

Misleading issues

There is no question that some cryptocurrencies are used for bad things. The best-known example is Silk Road, an online market where people laundered money and bought illegal drugs with Bitcoin. The false idea that cryptocurrencies are only used for illegal things slows their acceptance.


Blockchain technology is what it is now and will be in the future. As more businesses learn about its usefulness, they will invest more money, time, and resources. As a result, more use cases will become apparent. Although we only scratched the surface of the uses of blockchain technology across various industries, the opportunities available in this sector are expected to expand exponentially.

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