A few years ago, way back in the late 90s, Citrix Online, the maker of GoToMeeting, was known as Expertcity. They had a service to provide computer help using experts who would connect to users via a browser based screen sharing application. That didn't work out so good so, they pivoted and created GoToMyPC and then GoToMeeting.
Here it is in all of its glory and beauty: the stuff that Google did that it don't do no more. All delivered a la carte in an infographic from the people over at Wordstream.