All hits that come from (search engine) domains that are listed here are counted as S.E. hits in the script.
This way you don't have to add hundreds of individual trades to get an idea about the amount of SE traffic
your site is receiving. By default, ATL comes with almost 150 SE domains.
To add a search engine, type the domain where the hits come from.
Note that in many cases this is not the same domain as where the
SE is on. For example, hits from Yahoo! Search don't come from yahoo.com
but from search.yahoo.com