Your definitions of different concepts are a bit weird and in some parts wrong.
For example why define blockchain like this and what is up with the last sentence, it makes no sense.
Blockchain is the digital technology that saves user data in the form of blocks over blocks and combines all of them in the form of a chain. Every blockchain block has a unique address that can be used to perform personal transactions.
Blockchain is simply a chain of blocks.
Blocks also don't contain "user data", they contain transactions.
Blocks are also not "combined", they are "chained".
in blockchain, the miner uses software that allows their computer systems to connect through any node being used for the mining process.
That's another weird definition.
A miner is someone who is using their computing power to perform the "work" needed in the Proof of Work algorithm to find the next block.
Miner in the blockchain is one who participates in creating transactions of cryptocurrency and also one who is creating new cryptocurrencies and validating their transactions on blockchain.
Wrong.
Miners do not create transactions, they also don't validate transactions. They only perform work to find the next block and get the block reward (which is creating the new coins of that cryptocurrency).
Users create transactions and nodes validate these transactions.
Blockchain is basically a decentralized system that cannot be hacked.
Wrong. Blockchain is just a chain of blocks. It does not have to be decentralized (example is all the centralized shitcoins and the new nonsense known as CBDC).
Whether or not it can be "hacked" depends on the cryptocurrency, blockchain is just the database. For example if you use a weak cryptography algorithm (eg. weak hash or a weak EC curve) it can easily be hacked.
Data on the blockchain is present in encrypted form.
Wrong. Nothing in blockchain is encrypted.
Pool mining is a technique that allows individual miners to earn payouts that are more consistent than those that they would receive individually. Because a large number of users are operating on the same network, pool miners in blockchain have the potential to produce a more significant profit.
It is not about profit though, pool mining is about getting paid for the amount of work you perform without worrying about whether you find a block or not.
Cloud mining is a way to get cryptocurrency coins or tokens without having to use any tools or gear. For the most part, bitcoin mining coins are made by computers. Cloud mining lets you rent computer power from other people and make money. You will make more money if you rent computers.
Theoretically. Otherwise in reality cloud mining is a Ponzi scheme.
Let's understand the advantages of Mining in Blockchain:- When you mine, you secure transactions and put them into blocks, which makes everything very safe. Hackers can't easily change transaction data because these blocks are secured. A block is part of a record that can't be changed once it's added to the blockchain.
Only if the cryptocurrency we are talking about is bug-free and follows the concept of immutability.
Otherwise there are many shitcoins that are filled with bugs and some that don't care about immutability like ethereum where they have and can roll back blocks anytime they want. Which means your transactions are not safe in such blockchains!