Usually I see guppies using this abriviation after writing ‘Allah’
What does it mean? Can someone please explain?!
I think it is a shortcut for subhanao-wa-taala
Subhaanahu wa ta'aala Glory be to Him the Almighty.
It's best and most respectful to post the proper tasbeeh: Subhanahu Wa Ta^ala. And when you want to type it again, copy it and paste it. Don't put: SWT!! or SAW!! after the name of the Prophet!.. It's not haram but the scholars said it is Makrooh, or disliked.