What All to Study For Website Performance

[anand84]

I have a decent traffic website now and now have to start looking religiously into the different parameters to study website performance. As website owners what all parameters do you look into on a day to day basis. I have till now only been studying:

1. The website traffic
2. Total revenue made
3. CTR and eCPM of the ads
4. Referral URLs

What other things should we be measuring for exhaustive website performance study?

[phranque]

maybe not "check every day", but site load speed [webmasterworld.com] can indirectly affect the other metrics.

[StoutFiles]

Loading speed and unique, interesting content are the two main parameters. If you have both you will be fine.