What “Deprecated” in the BeBuilder means?

After Betheme update to version 26 or later, when editing content using the BeBuilder (previously known as Muffin Live Builder), you may come across set of options labeled with the Deprecated heading and they are greyed out.

For backward compatibility, the old options have been moved to the Depreceated tab. To use new options, move them to the Style or Advanced tab, or leave them unchanged, unless the situation requires it. A change in the Depreceated tab requires a page reload. These options are not visible if they have not been used previously. As of version 26, all settings related to these options have been split between two tabs: Style and Advanced.