We automatically generate sitemaps based on your ToC
We generate SEO friendly URLs based on each page's title
The HTML we generate covers the essentials:
We generate HTML titles and descriptions based on your GitBook page's title and description
We avoid duplicate content through smart canonical URLs
Image captions are rendered as alt attributes
We don't generate keyword meta tags, because modern search engines do not use them to rank pages. This was officially confirmed by Google a few years ago.
Google does not use the keywords meta tag in web ranking