What does R mean in tabs?

'r' in Guitar TAB means to release a bend. Sometimes this is shown if a bend needs to be held for a long time, so you know when to lower it again. 'pb' in Guitar TAB means to pre-bend a note before you pick it. You push the string up to the correct pitch, then pick the note before releasing it or holding it.

💡
If you're looking for a custom guitar tab, we can create it for you on PaidTabs.com try it for free. We have more than 200 freelancers ready to create your custom sheet music or guitar tab. Affordable with money back guarantee. Note-for-note transcriptions by real professional vetted musicians.
Request Music Transcription Service - PaidTabs.com
Turn any song into sheet music or guitar tabs. High-quality and affordable custom note-for-note transcriptions service for Piano, guitar, bass, vocals.