I'm sure this has been asked a million times, but I thought I'd ask anyway. Do backlinks from unrelated sites help your SEO? I'm referring to natural backlinks that have traffic, not link spamming or link building tactics. But backlinks coming from decent quality sites that were created by real people.
Is a link a link? Does an unrelated link carry any weight?
For example, if a parenting blog linked to a science blog, does it help?