The Online Status is indicated by a small green circle next to the username, which let's you know that the user is currently logged in to Fiverr's website or mobile application. This is useful in receiving quick responses from sellers when contacting them.
The online user status is visible on various pages, such as the Profile, Conversations, and Gig pages. On the Category, Subcategory, and advanced search pages, you can filter the marketplace results according to users who are online.
For more information on defining your online status, see Managing Your Public Profile Settings.