Checkpoints - Do not use bold <b> tags to emphasize text
The <b> element only affects the visual presentation of the text, and does not convey semantic meaning. It can be used as a span of text to which attention is drawn for utilitarian purposes without conveying any extra importance. Semantic markup such as <em> and <strong> can be used to mark emphasized or important text so that it can be programmatically determined. Some assistive technologies provide a mechanism for determining the characteristics of content that has been created using proper semantic markup.
Accessibility (WCAG 2.0 Level A, 1.3.1)
The checkpoint examines the entire HTML source code of a page and reports if any <b> elements are found.