It's all about making your computer programs super smart. To do this, you need to learn about data structures and algorithms. Here is the simple Illustration, take data structures like a box where you store your toys and take algorithms like instructions on how to build a castle. If you picture it this way, you’ll understand it well. It's neccesary to learn about data structure and algorithms to make your own computer games or apps. My goto resources for learning data structure and algorithm is GeeksforGeeks.