Accessibility for Content editors and content designers

Perhaps most fundamentally, content should be understandable by the people who are trying to read it.

Use headings to break up content and improve readability Headings should be accurate and informative Headings should convey a clear and accurate structural outline of the content of a webpage Headings should not skip hierarchical levels.

Links must have some text associated to them if you are making an image a link, ensure the image has useful alt text.  Link text should be descriptive Links should make sense out of context and out of sequential order. 

Using visual emphasis appropriately is helpful in conveying meaning, but assistive technology doesn't always read out formatting, so if the emphasis is critical to understand the text — then you'll need to find another way to  communicate emphasis.  

Do use the blockquote element for long quotations. Do not use the blockquote element to apply visual styling alone For inline quotations, quotations marks are sufficient.  

Alternative text is essential for conveying non-text information. You should describe the purpose of the images in as few words as possible.