One of the many things Google prioritizes when ranking pages is the user experience the pages provide. One aspect of the user experience Google values is the safety of the page, where whether the page has an SSL certificate is a factor that is looked at.
SSL certificates increase the safety of your page, by encrypting the data that gets sent between you and your visitors so it won't be accessed by anybody else. Having an SSL certificate is not just a benefit for your SEO, but also your website's safety, which can increase your customers trust in your website.
An SSL certificate can however also require some work, by making it necessary to make sure your links are leading to the HTTPS (SSL certified) version of the pages.
With Morningscore's SSL checker you will easily be able to find out if you have an SSL certificate, but you can also easily find out what pages contain links to HTTP (non-HTTPS) sites. That way Morningscore makes it not only easy to see if you have an SSL certificate, but also check if it's set up right.