If you have multiple pages with the same title but different content or you want to know which content you link internally, you may want to look up the node number of the page first.
You will see the node number in your browser's address bar when you are on an edit screen.
For example, if you want to link an internal link to another page in a navigation link or in your content, you can find your page by:
The node number of the page, being node / XXX
The title of the page, being the test / test
Then click on the correct page in the suggestions that the website makes.