10. Rate of New Inbound Links to Site (The frequency and timing of external sites linking to given domain) – “I don’t think getting fifty links overnight will kill you. Especially if those links are bringing traffic and from quality sites. Getting 100K links overnight and having no visitors or search queries as a result smells abit fishy no matter how you look at it.” – Rae Hoffman, Principal, Sugarrae SEO Consulting.