Tabulature or tabs is a great way to learn how to play guitar. Many websites offer guitar tabs, here are some of it online:
Browse 3000+ popular guitar tabs at virtualsheetmusic.com: (rock, hard rock, metal etc.)
Guitar Pro is a great guitar tool that also offers guitar tabs.
Ultimate Guitar is the best-known website for guitar tabs and has been around for many years. They have a huge selection of songs and accurate tabs.
Songsterr “Guitar, bass and drum tabs & chords with free online tab player. One accurate tab per song. Huge selection of 500000 tabs.”
Musicnotes.com also have many guitar tabs
YouTube is also a resource for finding guitar lessons and guitar tabs. You can find guitar tabs for just about any song on YouTube.