July 22nd, 2021: What did you learn this week?

It's that time of the week folks. So wonderful code newbies, what did you learn this week? It could be programming tips, career advice etc.

Feel free to comment with what you learnt and/or reference your TIL post to give it some more exposure. 👇👇🏻👇🏼👇🏽👇🏾👇🏿