Admittedly, it's always fun to tweet random emoji at Google's Twitter account, but that's not how this works. In an effort to show off how powerful its search engine's Nearby capabilities really are, Google is tweeting back.
Here's how it works: Tweet an emoji at the official Google account on Twitter and it will reply. You might get a GIF reply, as has been the case for anyone tweeting food emoji, or you might find yourself reciting Destiny's Child lyrics. The point is to tweet an emoji that can activate Google's Know Nearby capabilities. Not all emoji will work, but the official Google Twitter account will do its best to satisfy you with query results. Here is mine: