To declare a page as an objective, it has to have already gathered data.
Go to Settings > Goals and Sales > Goal pages, select the appropriate site from the dropdown list, and click the Add button as shown below:
Next you need to look for the page you wish to make a goal page in the list of your site's pages. There are two ways you can find it:
- either it generated data in the last 30 days
- or it has generated data during the current day
In any case, this is how you should proceed: