When doing a Google search for 'stack exchange', you get this top result (at least I do):
Under 'Stack Exchange: Hot Questions', we see the following line:
Stack Exchange Q&A communities are different. Here's how: Speech bubbles. Expert communities. Each of our 166 communities is built by people passionate ...
This is presumably happening because on that page (http://stackexchange.com), we have the 'here's how:' and then an image of... speech bubbles. I'm guessing that it has something to do with alt text.
Any way, it looks... kinda silly, TBH. Is there a way to change the front page so that it doesn't say that?
In addition to this, searching on Bing results in looking like the network is Worldbuilding.SE: