Also getting this for some pages:
The <h1> tag is missing.
Recommended Action:
Add a header to the page by using a <h1> tag and place it within the <body> of the page source. Example: <h1>A precise and descriptive headline for the page</h1>.
SEO Explanation:
The <h1> tag is an indicator to Bingbot and web visitors of what the body copy's primary theme or topic is. The <h1> tag reinforces the core keyword(s) found in the title, description, and the body copy. We recommend that the <h1> tag includes keywords that reflect the contents of the page and that it is not longer than approximately 150 characters in length.