https://medium.freecodecamp.org/all-you-need-to-know-about-big-o-notation-to-crack-your-next-coding-interview-9d575e7eec4

As part of my coding bootcamp (called Microverse), I needed to build up skills in various areas to become fully prepared for my first software position. And any bootcamp worth their salt will include a fair portion of the curriculum geared towards getting ready for the infamous coding interview.

So to this end, at the start of every single day, I work on solving algorithms, as this is a major part (and to many the most difficult part) of most coding interviews.