probably been asked before but after a quick search couldnt find anything whats the tags thing at the bottom of each thread with some words under the title tags??
I think Paul or gareth prob explain it a bit better but you can tag words in the topic and it shows them at the bottom, Basically key words of the topic You may be able to search by tags which could show all posts with same or similar topic ( i think) .............................. and waits to be corrected
Thats it in a nutshell,for example I may tag a thread Ian Ayre is a cnut,if you do a search no need to guess what thread it will help you find.