Actors are Apify's unique robots. Actors run on the Apify platform and can automate tasks such as sending an email, updating spreadsheets, or getting data from websites. If you can do it manually in a browser, there's a good chance an Apify actor can do it for you.
What is an actor task?
Tasks are configurations of an actor with particular settings. This allows you to run an actor with the same settings multiple times without creating a new configuration. With tasks, you can also have multiple different configurations of the same actor.