Critical Error <H1> </H1> tag does not exist in the source code
Add H1- header tag. eg: <H1>text for the title of an article or a headline for the page copy - precise and descriptive</H1>
An H1 tag is an indicator of what the body copy is about. Search engine crawlers use the H1 tag (almost as important as the Title tag) as a major component for determine the page's relevancy to given keyword(s). The H1 tag reinforces the core keyword(s) found in the <TITLE> and META DESCRIPTION, which improves page relevancy and search engine ranking. Recommend: Use an H1 tag that includes keywords that reflect the contents of the page. Recommended character length, including spaces: 150 characters.
Little Error More than 5 in total of <H2>, <H3>, <H4>, <H5> and <H6> tags exist in the source code
Only H2-H6 tags are valid fo indicating content segregation
Search Engines treat the H2-H6 tags as an indicator or content seperation. For example, the H2 tag could be used for sub-sections of an article and H3 for sub-sub sections of the same content.
Mild Error There are less than 5 characters in the <H1> no enough content found witin the <H1></H1> tag
The H1 tag is recommended to be within 150 characters, including spaces. It is to act like the headline of the copy - precise and descriptive.
An H1 tag is an indicator of what the body copy is about. The H1 tag should be a precise description of what is to be expected in the body of the page. Try not to exceed 150 characters in the H1 since it is a headline (title) for the page text. Recommend: Use an H1 tag that includes keywords that reflect the contents of the page and keep it within 150 characters.