Datadriver for Test step

*** Test Cases ***
validate items displayed on the cart page
Fill the login Form ${username} ${ValidPassword}
verify home page
add items to cart and checkout ${SKUname} -------> is that possible can I send the SKU name via excel or csv sheet. if yes how? if not why?

What you are asking is very similar given in the readme page of documentation for DataDriver: example-test-suite.

Short answer: Yes you can drive it from excel with DataDriver, it’s covered pretty well in the documentation.