And what is algebra for?

Algebra as well as explained in previous posts, works for many different fields, and are the key for human development in the 21st century. In this post, I could find two different videos that explain both whats algebra for and how we feel it in our day to day:

For both videos, it is important to put english subtitles since both of them, from the same channel, speak in spanish.

As well as we could see in both videos, algebra is technology, computers, advance... everything around us is constructed through algebraic structures.