Search site:yoursite.com and check out the indexed results
Being aware is probably one of the most valuable tools any digital marketer can develop. While doing a routine checkup of indexed pages for a plastic surgery client we noticed something odd--and bunch of pages indexed with https://
"Huh", this site doesn't run SSL...
"Let's click it and find out what happens..."
OK...that's not good!
We'll skip the how-to-fix-it details here. The point being--if you're doing SEO for a client--aka getting their pages into Google's search index--make it a regular task to look and see what Google's seeing!