Google announced that websites using HTTPS, the secure version of HTTP, will have a better chance of ranking well in Google searches than those that dont. Google is deliberately vague about how many signals it cares about, what they are and how much each one matters. Its what made organisations care: Google is cagey about what signals are, because organisations can’t easily test and isolate their website’s signals and because there is intense competition for good Google rankings those that care about good Google.”]
Source: https://nakedsecurity.sophos.com/2014/08/07/how-google-plans-to-get-us-all-using-https/