Based on the information given the kind of formatting she need to use is hyperlink.
Hyperlink is link that enables users or readers to go directly to another website or another webpage.
Hyperlink can be included in a website in form of text or in form of a bookmark which help to lead user to another page once the user click on the link.
This link can be included in a webpage or newsletter to serve as a reference for user and they are often underlined or may include "click here".
Inconclusion the kind of formatting she need to use is hyperlink.
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