WordPress has been around for more than 15 years. And no other Content Management System (CMS) has been as simple and powerful as WordPress at the same time. Moreover, for the same reason, WordPress is the leader in the CMS market.
When you want to put up a site or blog, the obvious choice is WordPress. Because it requires almost no coding/programming knowledge to start with. But the problem is, you have to configure the site to make it secure. Otherwise, Google Chrome shows the site visitors that your site is not secure. Same goes with Mozilla Firefox. Firefox displays a dark padlock with a red slash.