Today June 15th is a total Lunar Eclipse. Google told me so … I didn’t know what the doodle was about today so I clicked through. When I did I scanned the results and found the best use of the description meta tag I’ve seen in a long time.
When you click through it’s the Wikipedia page with the correct scientific information.
I have told many clients the description is your first impression on search pages. It needs to contain relevant, informative content. Think of it as a couple of lines of free advertising and think, in a couple of lines, what do you say to stand out from the crowd?