Google Analytics is often used as a tool for business and market research. It allows one to measure and collect data for the purposes of understanding and optimizing web usage.
The benefits to this 1-time service are the following...
- Helps get Google indexing your website in a matter of weeks vs months.
- Helps Google index all of your website pages vs just a few, this helps get your website as much exposure as it can
- Installing Google Analytics on your website is also a key item Google looks for on most any website
So what the service does is basically force feed Google the pages in your website which in turn helps with Google showing your website for various searches.