When to use new campaign or new adgroup?

advice please

[notuagain]

Hi all,

I've been running adwords for about three weeks now and so far no real complaints, although I have no way of tracking ROI as I link to a third-party sales site.

Now I am in the process of 'concentrating' the ads, as I now have a good set of statistics to base my seperate ads on.

Just one thing that I am very curious and a bit confused about, when does one decide to create a seperate campaign or a new adgroup within a campaign?

Any thoughts on the factors that should influence this decision?

Thanks.

[hannamyluv]

It is totally up to you as far as campaign. I segment by product type. I have several hundred ads and having them in product grouped campaigns makes it easier to track down one when I am looking for it.

Adgroups, though, should be tightly focused on a single keyword with its variations (misspellings, related phrases) and the ad should be highly targeted to attract people looking for that keyword.