The fifth tab on your Yapster screen is your activity tab. This tab contains a log of all direct interactions with your profile, which could be:
comments or individual reactions to your newsfeed posts;
direct replies to your messages in yaps;
@mentions.
An orange dot next to your activity tab indicates you have new notifications to look at.
An orange dot next to your home tab indicates you have new posts to look at.
Clicking your activity tab will reveal more details regarding your individual notifications.
The orange dot next to the notification of a reaction in the below screenshot shows a new interaction. Clicking the notification will take you to the content within Yapster, whereas swiping left on the notification will reveal options to Mute 🔕 or Clear ✔️
Use the swiping options to mark notifications you'd like to refer back to as unread.
Clicking the orange double tick in the top corner of the screen will dismiss all unread notifications in your Activity tab 🔔