My idea is:
Google chrome displays the page title and favicom in each tab.
For Mautic 6.x, the page title is currently hard coded in each relevant page twig file i.e. its defined multiple times. If you wanted to change the page title to something other than Mautic you have search for and modify a number of twig files and possibly some js for it to work.
In one of the Mautic configuration sections you can enter a Mautic brand name. I think it would be a good idea to use the brand name as the google page name or possibly a short version of it.
This could be done by making the twig page title a global variable which the brand name could populate. The twigs and js would need modifying to use the global variable. Once done, branding changes would be easy and simple to change.
Thanks.