Understanding your notifications
The bell icon in your sidebar keeps you posted on activity related to your account — likes, replies, reposts, new followers, and mentions all show up there as they happen.
Tap into the Notifications tab to see everything gathered in one running list, newest first, so you can quickly scan what's happened since you last checked. Unread notifications are visually marked as different from ones you've already seen, and the small badge on the bell icon clears automatically once you've opened and viewed your notifications feed. If the volume feels like too much, you can fine-tune exactly which of these categories you want to be notified about at all from your notification settings, turning down or off the ones that matter less to you personally.