Are multiple SE sites covering the same subject, with higher specificity, detrimental?
34072
Super User versus Unix and Linux versus Ask Ubuntu
117023
Site-specific spellcheck?
30548
What limitations does converting question links to links with titles have?
61208
Small overlapping text on Related questions in MSE
148444
Same content over multiple sites
64106
Duplicate content concerns for directory listings?
26927
Is it alright to use multiple h1 tags on the same page, but style them differently?
137083
Is it OK to copy parts of an answer from one SE site to an answer on another SE site?
92212
One post with multiple questions or multiple posts?
141381
Correctly indexing multiple domains with same content in Google and others
4388
Why can I only choose certain sites for migrating a question?
146225
Duplicate questions on other SE sites?
6760
Sitemaps - one per subdomain or one for the base domain?
146149
How to share a question on different related SE sites?
33291
Why do I need multiple sites for the same property in Google Webmaster Tools?
45638
How is pattern specificity decided?
143997
What about site-specific post notices?