Talking to Google「s Assistant is a mishmash of experiences that range from conversing with a service implemented by Google like Weather, to a third-party service that」s part of Home control and thus natively integrated like Philips Hue, to a third-party Actions on Google service that comes with a different voice and requires a「talk to service_name」syntax like Harmony or Todoist … Google has united all of them under one directory that「s easily accessible from the web or when you invoke Assistant on your phone and tap the blue envelop-like icon on the top right to get to Explore … Go to Explore like explained above, choose any service or search for one, and you」ll be able to scroll down to see existing reviews from users (the option has been live for 2 days so there aren’t yet a lot of reviews) and add your own.