I'm using AMresurrected with the Artio plugin supplied by the author of the component. I've modified a bunch of the ads to make the artio generated keywords and description more search engine friendly.

However if I purge all of the SEF urls with artio, when I review the newly generated URL's the keywords and description shown in Artio don't change.

Am I doing the right thing to regenerate the keywords and description?

Hello,

The Purge now moves the URLs to trash only, and when the URL is generated again, only the SEF URL is updated and everything else remains. If you want to have meta tags regenerated also, you will need to either delete the Trashed URLs after Purge, or directly Delete the URLs you want to regenerate using the Manage SEF URLs page.
Unfortunately, it is not possible to regenerate only the meta tags at the moment, whole URLs need to be regenerated.

Best regards,
ARTIO Support Team