With notebook dashboards its possible to add a markdown or HTML notebook cell to populate text. markdown:

%md
# This is a MD heading

This is a paragraph with **bold text** and *italic text*.

html:

displayHTML("""
<div style="font-size:20px; color:blue;">
    <h2>This is a HTML heading</h2>
    <p>This is a paragraph with <b>bold text</b> and <i>italic text</i>.</p>
</div>
""")