The code splits the URLs string into an array called urlsArray based on a comma separator. The code checks if the array urlsArray has at least 10 elements. It joins all the elements in the array using a newline ('n) and assigns that result to the variable urlList.
It creates a Blob object using Utilities.newBlob() with the csvContent, specifying the file type as 'text/csv' and naming it'mobypark-... -affiliate-opportunities.csv. It then creates a Blob object using Utilities.newBlob() with the csvContent, specifying the file type as 'text/csv' and naming it 'mobypark-' followed by the domain variable and '-affiliate-opportunities.csv'. It creates an object that contains the filename, the content (byte array from the Blob) and the MIME type.
The domain variable is followed by a list URLs and the body variable. The string will include a message that indicates the URLs have been attached in a CSV format if an attachment has been created.
Note: Domain variable should be defined in code prior to this snippet.