web3.js is the most used utility for communicating with smart contracts in your web applications to convert them into decentralized applications. It's capable of managing endless transactions and works automatically once set up.
The problem comes from the fact that many web3.js applications are not optimized, at least not as well as possible. Because we're dealing with smart contracts, inevitably the code gets confusing really quickly, making maintenance harder over the medium-long term. That's why it's important that you study systems to create better web3.js dApps from the start to learn tips and tricks that will make you a better programmer when it comes to interacting with smart contracts.
You'll be working with a lot of dApps using web3, so why not learn the best way of doing things to save you headaches in the long run while...