I actually had to look this up. I'm used to it meaning surface mount device, as used here!
I guessed it given the context, but I don't think I have ever read it like that before!
You can add location information to your Tweets, such as your city or precise location, from the web and via third-party applications. You always have the option to delete your Tweet location history. Learn more
I guessed it given the context, but I don't think I have ever read it like that before!