Your site is examined from the user's perspective - its ease of use (navigation, finding content, interactive tasks), its accessibility and load time.
Content is judged on its meaning, relevance and interest relative to business and user goals. Its impact on search engine indexing is reviewed. Grammar, spelling and readability are also assessed.
Issues include consistency of layout and design, positioning of content on the page, appearance at different screen resolutions, appropriate use of graphics to reinforce site identity and content, harmonious use of colour and typographical clarity.
The coding standard of your website affects its compatibility with
different (past and future) browser versions and therefore whether it
is being viewed as intended by your target audience.