In order to provide a more professional and cleaner presentation, customers are requesting a graphical overlay(s) (or lower third) possibilities in Webex.
This way a presenter could add custom Titles, Roles or else to their Video feed and make the session look more professional.
Graphical overlays can be understood as the counterpart to background customization but in the foreground.
These could include the following:
Title of the meeting, Name/Role of the presenter, the logo of the customer, scrolling information, etc.
Here is a reference: https://en.wikipedia.org/wiki/Lower_third