A beacon is a great way to attract your users and make them engage with a new feature or component that was added to your application.
The beacon is the pulsating circle. You can place it on any element in your application by selecting it in the flow editor. The beacon setting is under the display settings.
A great way to use a beacon is as a launcher to another guide. This will allow you to see separated analytics for users who engaged with the beacon (by hovering over it).