Q: What is the other on my macbook and how do i get rid of it?

Jan. 2016 topic on "other" usage on hard drive - https://discussions.apple.com/thread/7339193 -

You could delete OS X, but then you wouldn't be able to run your Mac.

Other is OS X, documents, libraries, email, messages, and everything else that isn't specifically an application, an audio file, an image file, or a video file.

Here is the definition of OTHER:

https://support.apple.com/en-us/HT202867

You certainly do not want to rid your MBP all of OTHER.

If you want to thin your MBP of data, download from the Internet OmniDiskSweeper and Grand Perspective (both free) and open them. They will show all of your files and the respective sizes. Transfer to an external HDD or delete files you no longer want on your MBP.

Do not forget to empty trash. Only then is space allocated for new data.

Ciao.