A View is a customized version of a table that is filtered and sorted in a specific way. You can create public views that are available to all members of the space, or private views that are only visible to you.
To create a view, filter the table, then click on the name of the current active view.
(custom) shows that the view has been filtered.
A menu will appear with view options. Select Save View from the menu.
A dialog will open where you can name the view and choose whether to make it public or private. Only admin users can create public views.
Once a view is created, you can rename it or delete it, by clicking the three dots beside the view name. You cannot change the view's visibility after it is created.