Typical Business Metrics for Website Success

For your website to be a success you need 3 components:
a) new visitors coming to your site,
b) these new visitors to become customers,
c) the loyalty of your customers.

This is how it's usually measured:
1. The number of the sales
2. Traffic numbers - page view statistics
3. Time needed for visitors to perform their tasks
4. Number of visitors that click on important links