A conversion rate is the measurement of how many visitors to your website orders a product, requests a brochure, signs up for a newsletter or downloads a file. There are many other forms of conversions such as an e-mail or telephone call from a customer. The best method of measuring your conversion rate is through Google Analytics. This will keep track of how many people have performed a conversion on your website.  It will also keep track of what pages the visitors have gone to before the conversion. If the visitor has left your website just before a conversion, the analytics will show you the page where exited your website. This is useful for finding out which pages need to be more attractive and engaging for a visitor so they will complete the conversion.

I would recommend analytics for every website owner, not only to track their conversion rates, but also to measure content that is performing and content that is causing visitors to leave the website.  With these statistics, you can alter content to improve your conversion rates and the number of visitors to your website.