HTTPS and SSL certificates are now essential tools for website building. For enterprises, it is generally recommended to choose a paid SSL certificate. Firstly, it can display the brand and image of your enterprise. Secondly, the price of paid SSL certificate is still affordable for the enterprise. For individuals, the numerous free SSL certificates are also quite good.
Three free SSL certificate online monitoring and expiration reminder services - no longer have to worry about certificate expiration
Installing an SSL certificate for a website is now a routine action, but if you have dozens of websites with SSL certificates installed at the same time, you may forget to renew a certain SSL certificate due to your own negligence. For some websites with very high application requirements, it will bring considerable losses.