This group focuses on best known practices for site audits and rescue projects, and provides a forum for comparing notes as these practices change and evolve.
What's different about this group? (?) To discuss best known practices around specific areas of Drupal, such as contrib development and security, we offer you this fine list of links:
The Site Audits group exists alongside those, but is a resource for discussing and performing all kinds of audits, including maintainability, security, usability, content, SEO, performance, and so on.