The Alexa-rank auditing tool is complaining about a generator meta-tag that is according to the HTML5 standard.
<meta name="generator" content="Company Name">
The Alexa Site Audit Report complains about this tag being insecure:
What is this topic about? HTML tags . on your pages that expose information about the software used to build your site.
Why is this important? Insecure meta tags on your website provide information about the underlying software (such as Wordpress) that could help someone attack or compromise your website.