Google has indicated or perhaps algorithm’d is a better word for their requirements er “recommendations” toward improved search engine rankings.
You might be thinking, “Is an SSL certificate right for my website?”
While I could write volumes on the topic, I’ll defer to another authority, since they have written a helpful, timely article about it. Here is one such article SearchEngineLand.com that I believe covers it quite nicely.
Google Starts Giving A Ranking Boost To Secure HTTPS/SSL Sites
by Barry Schwartz on August 7, 2014
Now, if you’ve taken time to read this, you may feel more confused than ever. So, I feel compelled to give my 2 cents. Should you or shouldn’t you have an SSL certificate for your website? If you are selling online or exchanging sensitive data through your website, you absolutely should. If you have an established small website not selling online, not exchanging sensitive data, and a small budget to boot, you must look beyond the initial cost of getting the certificate and having it installed on your hosting server. Converting your website to make it completely functional as an SSL site could mean a great deal of retooling at an unexpected cost. If you developed your own website and consider yourself a novice, don’t try to go it alone.
This article covers many of the concerns about making the transition:
The Big List of SEO Tips and Tricks for Using HTTPS on Your Website
September 8th, 2014 – Posted by Cyrus Shepard to Technical SEO and Advanced SEO
Not to deter you, but this question calls for a case-by-case assessment.