Cassini is Ebay’s search engine that works much like Google does. Cassini factors three main items in its algorithm. nnKeywords- Cassini factors in keywords for both titles and descriptions.nBuyer behavior- Buyer behavior is classified as click throughs. Cassini will rank a product and similar ones higher the more other users click and purchase the item.nSeller performance- A seller’s previous performance also is a factor in Cassini rankings. These are successful sales, customer service and ratings.