This block gives you the possibility to insert a divider line in your posts and pages so you can hide the content of the post partially, namely everything that is AFTER the divider.
In this way, members will see the whole content, whereas non-members will only see the first part.
After the divider, the plugin will automatically show the default alternative content (if set in the Membership options from the page/post).
Please, note that this block only works if you have chosen to show an alternative content for non-members from the General options, as explained here.
Yet if you want to hide the alternative content, you can enable the “Hide alternative content” option (if necessary) from the page builder editor:
If you enable this option, the alternative content will be completely hidden for non-members, so they will only see the content previous to the members-only block: