You need something like a web press kit, provided by your Label or yourself.

It has to contain:

Your music

Album, EPs, Singles as .mp3 files, mostly packed as .rar and password secured. (Password should be changed every once in a while.)

Biography & Infos

Your biography, your band members, a written discography and, if you have, short reviews from the press.

Pictures & Artwork

Pictures of your band, live and promotional work, also artwork and your band logo (as .png).

Links

If you have, it would be helpful to get a link to your website, YouTube channel, Instagram, Facebook page and everything you have – information for the fans.