Adding tags to mp3s for use in music players

I'm hoping this is the correct place to ask. Basically, I'm using **cmus** and have a little bash script to automate downloading, renaming and moving a mp3. However, cmus just lists the song name as its full path in the library (e.g.: /home/user/music/genre/song.mp3) I'd like to change this by adding tags such as album, title, and artist to the mp3 files. I'm not sure if in Unix some files inherently have metadata like this or if you have to create the data in a specific way for the music player to be able to read it. I read the cmus man page and I don't see anything about how it reads tags or labels. Overall, through a bash script after reading an input, such as 'albumname' I'd like to know how to assign that input as the album tag of a mp3 file for a music player to use.