Basically, if there are any insecure items on your SSL page.
Like -
- Insecure calls to images,css, and javascript
- Images called insecurely from linked css and js files
- Expired cert, invalid or missing intermediate certificate (including 3rd party SSL certs.)
- SHA-1 algorithm test, POODLE test, insecure form calls for Chrome
You can simply check if your web page is secured or not from here -
Admin