Nest headings in order, as in this example. Some user agents will use the heading structure to improve or add useful navigation features, or to abstract the document. Using heading levels appropriately will ensure your document is more accessible.
Page title: use (<H1>)
First major section heading: use (<H2>)
First sub-section title: use (<H3>)
This is where the content of the sub section will go. It may be paragraphs, lists, quotes, diagrams or whatever your document requires.
Second sub-section title: use (<H3>)
Second major section heading: use (<H2>)
First sub-section title: use (<H3>)
To Checkpoints for Guideline 3.Next slide: Example for Checkpoint 3.5 continues