Shopping comparison feeds are important in the marketing of an on-line store, but the upkeep of a feed can be tedious. Within the channeladvisor system shopping feeds are automated everyday, which had enabled us to integrate with google base and shopzilla for this client. Shopping comparison feeds are a great way to boost exposure and sales but as with systems such as Google Adwords you still need to optimise your budget and not throw (waste) money at it.