In short, they write about visual stuff you'll find interesting.
But (and here's the bad news), you do have to read. Yes, read. Terrifically old-fashioned, I know, but still one of the best ways to engage information in a participatory (not passive) way. That's important.
Do it. And feel free to peruse related links that come up on the right hand side. You won't be sorry! Sign up for a "web account" (free) for some expanded access.