A test description should include all the information necessary to run a test with the best results:
scope of the test (what the crowd should focus on)
features description (Registration & Login, Search, Filters and Sorting, Product List, Product Detail Page, Cart, Checkout, Wishlist, etc.)
intended behavior descriptions (if any or known)
product functionality (everything about your product functions and tasks)
your goals for the test (what you would like to check)
out-of-scope (if any)
known bugs list (if any)
You can also upload files with user stories or test cases, or any other test documents you want.
You can find more information here. If you are still not sure how to proceed, please contact our Support via a chatbot.