Thanks everybody for your responses.
What I've come to realize is that (as a couple of you noted), if I log into WU I don't see ads.
My wife and I have also been viewing WU on our smartphones, a tablet, and occasionally on a laptop.
Those devices have been used without logging in to WU, and ads have been included.
I'll set up the phones and tablet to log into WU to avoid the ads.
Thanks!