If you want to add a link to one of your webpages on your site, just highlight the words in a TEXT content block that you want to link and then click on the "World with a chainlink on it".

That will take you to a window that will allow you to enter the Web Address or Site Page that you want the link attached to.

Now anytime someone clicks on that text they will go to the Web Addrees or Site page that you entered.

Keep on mind that if you are adding a link to an outside web address, you should select the option to open the Link in a NEW WINDOW, instead of the CURRENT WINDOW. That will allow your website to stay open, making it easier for the user to return to your site.