Once you get the hang of it, it is quite useful.
Yesterday for instant I added an extra fiver to my ad for drive cleaning as it was a hot and thought people would be out in the garden and had three people message me through the page about quotes from seeing the ad.
The contact us button can be changed to what you want it to be. If yours is set up for email, website or phoning you everything someone clicks on that button it'll report to you, Mines set up to my website.