They are google ads and the forum doesn't place then there. Instead they are there based on your google searches. You can't even imagine some of the things that have popped up as ads after I've done some searches. Right now my ads are American Express and Gwyinnee B because I clicked on something over on FB. Way down at the bottom of my screen is Zappos misses me
The other day you were looking at that website about teacup Yorkie puppies and posted about it. So now your ads will be from that google search.