Content needs to be organised. Vessels and shapes do, too. A little bit of healthy OCD on your part can go a long way. Taxonomy is the bread and butter of content classification and distribution.
If you have been around content or created even a blog post or posted a picture on Instagram, you would know that search and visibility of your creation depend on the way you tagged it. A blog post without keywords as tags cannot be found easily a couple of months after being published, especially on a busy blog. It also impacts your SEO score and some other things. The same goes for your Instagram photo – if you have not used keywords (hashtags), your photo will be visible only to the people who follow you…and like you posts the most.