Hi all, I am really new on SEO. So if this is a silly question, please forgive me. I searched BHW but couldn't find an answer. My question is: I have two sites, their subjects are closely related but not the same. One of them is old and has much more visitor than the other, let's say this is site A. Is it OK for SEO that linking Site B from Site A via a banner? The banner will look like an ad. It will be visible on every pages on site A which has more than 1000 pages/posts. So there will be 1000+ links to the site B. Thanks for the comments.