I am making a fondant-covered cake board for the first time, but I'm not sure how to stick the ribbon around the edge of the board. Do I use a glue gun?

TIA!

You could use a glue gun, but make a thin stream of glue so the line of glue doesn't show.....but I just use a glue stick and tack it with pins till dry.....(remove the pins before icing your cake.) seems to hold just fine.

I use a glue gun...just put tiny dots of glue...Then at the end where the ribbon meets, I use corsage pins to secure the ribbon ends to the board.

Double sided tape. I can't imagine using a glue gun. Doesn't it show little ripples where the bead of glue runs along?

Yeah, wow. A few strips (doesn't have to be one long continuos strip) of tape, and bam. Done! No glue guns required.

I use a glue gun... if you do it carefully you can't tell at all.