kelkoo - Internet Marketing News and Blogs

Microsoft yesterday acquired Jellyfish, a shopping comparison site which offers cashback on purchases for users, and ranks retailers according to the amount they agree to lower their prices.

The terms of the acquisition were not disclosed, though Jellyfish raised $5m in funding last year from Kegonsa Capital Partners and Clyde Street Investments.

The importance of the shopping comparison market is growing, as these sites can generate millions of pounds for retailers. So let's take a look at what you need to consider when creating your product feeds.

First, the big numbers. Shopping comparison engines made between £120m and £140m in UK revenue in 2005. In some sectors, such as consumer electronics, they can drive more than 30% of sales.

It is therefore hugely important to optimise your feed...