To use emphasized formatting in HTML, the <em>…</em> a tag is used. It defines the emphasized text and adds semantic importance. Just keep in mind; it is a phrase tag, which renders as emphasized text.
You can try to run the following code to use the emphasized formatting in HTML using <em>…</em> tag
<!DOCTYPE html> <html> <head> <title>HTML em tag</title> </head> <body> <h1>Tutorial</h1> <p>Learn <em>Website Development</em> with ease.</p> </body> </html>