Track the percentage of users who are completing the goal you have setup. Use this to understand if your site is promoting users to fulfill the goal activity,. For example, if you want your users to fill out a form, ensure that your site's content facilitates the user to do this easily and without interuption or error.
The number of completed activities, divided by the number of total sessions for the specified goal, expressed as a percentage.
You have a goal setup for a form submission on your site. Last week, 100 users visisted the site, and 10 of those submitted the form. Your goal conversion rate is 10%.