"letting" means allowing or giving permission for something to happen. It is when you give someone or something the freedom or opportunity to do something. Full definition
But in addition to that, don't let not having these mats keep you from trying out this recipe! (theconscientiouseater.com)
I would guess most people don't let go of their ego unless life throws them a few gut punches. (relevantmagazine.com)
We hope that we are driving traffic to your blog by hosting this party, so please let others know about this party by linking to us! (homeremediesrx.com)