Yes, It is important to have a website with HTTPS certificate. and secure connection.
Matt Cutts always excited about websites moving to HTTPS, because this make his Job so easy as a head of Google’s web spam team.
HTTPS not cheap, you have to pay at least $450 per year to get HTTPS certificate.
However, I got a solutions for you.
If you are running on WordPress or any other website you can use this solution.
It is really simple. Go to https://www.cloudflare.com/ and sign up for a FREE package.
They offer HTTPS to all the clients..
If you ware using WordPress, you will see some errors after you do the configurations.
This is how you fix those common wordpress HTTPS errors.