Keywords in title tag

[Airco]

Is it better to add keywords separated by comma in all title tags of a site or should i limit this to one keyword per page?

[DaveJ|UK]

A title should be exactly that - a title.

A crappy title stuffed full of keywords will not get clicked as much as a quality one in the search results.

Google monitors clicks on links in the SERPs and takes this data into account for future ranking (much like with Adwords) so if your link doesn't get clicked, it gets demoted.

[Delivos]

Roger that DaveJ

Have you got an example Airco? It's be good to work through what you've got and what you're aiming for and find an optimised title.

[Harry Kendal]

The title tag shouldn't be dumped with too many keywords and the keywords in the title tag shouldn't be more than 65 characters (for google), as the characters more than that will not be visible in the SERP pages.