Sometimes you want to indicate you appreciate or agree with what someone said, without posting a full comment. A boost is a short, flexible, and personal way to respond to something directly.
Boosts can be up to 16 characters, and can contain emojis, text, or a combination of the two. It's a short blank field that you fill with whatever you want to communicate, however you want to communicate it.
On messages, documents, comments, and a few other spots, you'll see a 🚀 rocket icon.
When you click that, a small field will expand in place:
You can type anything you want in there, up to a maximum of 16 characters. Click the smiley face to choose an emoji (you can also choose from all the emoji*).
Hit return or the green check mark to save the boost, or hit the red X to close the field.
You can add more than one if you want, and they'll collect into a little boost party:
Boosts will appear directly beneath a post, with space for comments below:
Boosted comments look similar.
If you mess up, click on your boost and a little trash can will appear. Click that to delete it.