What is jQuery and what does it help for?

Answer 1

jQuery is a fast, small, and feature-rich JavaScript library.
It makes things like HTML document traversal and manipulation, event handling, and animation much simpler.

All the power of jQuery is accessed via JavaScript, so having a strong grasp of JavaScript is essential for understanding, structuring, and debugging your code.

Answer 2

it's like .dll files for C#, there are classes, functions whatsoever it makes the job more efficient