Ensure previews from search engines, social media, and other websites look as good as they can

Search engines such as Google and social media such as Facebook and Twitter offer various kinds of link previews that are often only available or are greatly enhanced by a site providing special metadata, largely falling under the OpenGraph rubric.

See for example http://www.codepositive.com/articles/optimising-content-previews-drupal-8-using-opengraph

• Ensure the new site isn't currently a downgrade over the old site by testing link previews on
• So long as it's not, at our leisure improve the previews shown on other sites using Open Graph metadata and possibly other techniques