How do you make use of those aggregators like feedraider.com etc.? Do you just submit your feed once and then it will always update automatically? Or do you resubmit it every time you add content? Let's say my blog is about dogs, but I add a new page about dog leashes...if I resubmit after updating the content do I use the new keyword "dog leashes" or do I use the main keyword of the whole feed (ie. dogs)?
Trying to get my head around this. Thanks for any help.