Google announces that sites that use HTTPS encryption will rank higher on search results than sites that use HTTP. This is done in an effort to make the internet more secure. They say the initial boost in search rank is small, but they hope to increase it in the future:
We’re starting to use HTTPS as a ranking signal. For now it’s only a very lightweight signal—affecting fewer than 1% of global queries, and carrying less weight than other signals such as high-quality content—while we give webmasters time to switch to HTTPS. But over time, we may decide to strengthen it, because we’d like to encourage all website owners to switch from HTTP to HTTPS to keep everyone safe on the web.