Example: Slack
Slack focuses on solving the user’s problem which in this regard is team collaboration instead of describing the app’s technology.
Example: Uber
The Homepage of the website starts with a clear headline which immidiately conveys the primary purpose of the website.
Example: Asana
Asana in it's homepage offers a straightforward explanation without overloading users with complex feature descriptions.
Example: Trello
The CTA in the homepage, Sign Up It's Free, removes barriers to action by highlighting the free nature of the product and keeping it simple.