This should be one of the best all-time free addons available for XF. It's created by xfrocks, arguably one of the best XF developers (I hired him for several projects) and released to the community by tinhte.vn, the #1 tech/gadget website in VN.
The latest version of this addon works perfectly out of the box and I'm sure it will only get better and better. It allows administrators to highlight relevant threads and help members (and Google) discover more of your valuable information.
I hope future versions will add support to pages and other XF content types. That will make this ROCKS.
Thanks again, tinhte.vn and xfrocks for releasing this valuable addon.