There's a lot of misinformation in this thread. Going to try to clear some of it up since I have some time free.

Quote Originally Posted by mido View Post
Now when Google is ranking HTTPS slightly better it is a good idea to get a SSL cert for your sites.
Really, a slight ranking boost should be the last reason that you choose to use HTTPS:443 over HTTP:80. Sure, the slight boost in rank is great and all, but it's certainly not going to be permanent without the data to keep it there.

Quote Originally Posted by MightWeb View Post
Basically, whilst slightly slower, SSL will add a layer of security on any transmissions to and from your web server to your visitor.
With the introduction of HTTP/2 (which more or less requires SSL) this is an outright lie; if you set up your server correctly, HTTPS will likely be faster than HTTP. HTTPS was originally slower because it was tacked onto a really old RFC standard. RFCs were updated, things are now faster.

Quote Originally Posted by ElixantTechnology View Post
I just looked into Let's Encrypt, and I don't think in my opinion that it would be a viable solution. From what I can tell, Mozilla is the only browser that would trust the certificates...
That's certainly not the case, considering I now have Chrome liking my LE certs. I would not use anything else unless I needed an Extended Validation Certificate, which I don't, because I'm not a bank.

Quote Originally Posted by MrGravyCakes View Post
These websites secure your data. It is important to check when you are making a purchase that the site is HTTPS, so that you know that you are on a site with SSL and it will protect your data.
SSL has little, if anything, to do with the data stored on a webste. Saying that a site is completely, 100%, fantastically secure because it has a green padlock is naive. You can't expect data stored on a website to be secure, and you can't use HTTPS as a measurement of that since SSL only crypts the transport. Not the insertion into the database, not the maintaining of that database, just getting it from you to them. That's it.