Don't Lose Traffic When Transitioning to HTTPS
Yes, installing the SSL certificate can be quick and straightforward, but there are details that need to be managed if you care about organic search traffic.
Don't make a mess of your SEO when you switch to HTTPS. Don't watch your website traffic drop when you can avoid it.
Use this checklist to guide your transition and enjoy uninterrupted traffic. As you probably guessed, it is always cheaper to map out the transition path before the fact, than to try to clean up a mess afterward.