The relevance is, I would suggest, that sometimes people inadvertently give the wrong information on their ads, and it is thankfully that knowledgeable people, like Tim etc, are able to correct the mistakes.
Some person may look at an ad, maybe being a newbie, and understand what is written to be correct, buy something only to realise later it is not as described. Then begins the process to sort the matter out. By the input of Tim et al, this problem may be alleviated.
Jonty