# Links - How To
Links are a great way to include other information without duplicating it or to provide someone the ability to take action.
There are two ways to add a link in the Communication Center. In the details section using the formatting bar as detailed in the formatting section, or by adding a call to action button link.
# Adding a Link
To add a link in the message editor, click on the links icon You can then either add an existing link or create a new link. The benefit of using an existing link is if you update it in one place, it will update everyone.
# Adding an existing link
To add an existing link, select the existing link button Then search by category or keyword.
# Adding a new link
To add a new link, select Create Link
Three fields are required, the title, the url and the type. The type determines if it will be a Call to Action, a button at the top of the page, or a related link in the related links section.
# Link Types: Call to Action and Related Links
A call to action link should be used to help the person complete the main task about which you are communicating.
The type of ‘Link’ is a supporting link that may be an external resource. It is very useful to add descriptions to these links.
You can also optionally a category, a publish / expire date time or a photo.
Add as many links as you like. There can only ever be two call to action links.