{"id":12049,"date":"2026-03-26T09:00:00","date_gmt":"2026-03-26T08:00:00","guid":{"rendered":"https:\/\/prosteit.pl\/?p=12049"},"modified":"2026-03-26T14:00:25","modified_gmt":"2026-03-26T13:00:25","slug":"ssl-certificate-what-is-it-and-is-it-worth-it","status":"publish","type":"post","link":"https:\/\/prosteit.pl\/en\/ssl-certificate-what-is-it-and-is-it-worth-it\/","title":{"rendered":"SSL Certificate \u2013 What is it, how does it work, and does your website really need one?"},"content":{"rendered":"
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Imagine a potential customer visiting your company website, trying to submit an inquiry via a form... and seeing the message "Not Secure." A moment's hesitation is enough for them to close the tab and choose a competitor. In a world where trust is built in seconds, technical details can have a real impact on sales.<\/p>

This is why the topic of HTTPS and website security has ceased to be an "e-commerce option" and has become a standard for every company present on the web. SSL Certificate<\/strong> Today, it is not just a padlock in the browser bar, but the foundation of secure communication between the user and your website.<\/p>

In this article, you'll learn the basics\u2014what SSL is, how it works, its types, whether a free certificate makes sense, how to check its validity, and when it's worth investing in a more advanced solution. Specifically, without marketing myths or technical jargon.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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What is SSL\/TLS and what does it actually do on the website?<\/h2>\n

If you are just starting your adventure with website security, it is worth first separating a few concepts that are often used interchangeably, although they mean slightly different things \u2013 but in practice, modern websites work together as one protection mechanism.<\/p>\n

What is SSL and TLS?<\/h3>\n

SSL<\/strong> (eng. Secure Sockets Layer<\/em>) is the original network protocol used to secure communication between a browser and a web server. In practice, however, it has long been replaced by its successor \u2013 TLS<\/strong> (eng. Transport Layer Security<\/a><\/em>), which is more secure and modern. However, in common usage, it is still called an "SSL certificate," even though it technically works on the basis of the TLS protocol.<\/p>\n

The simplest way to put it is this: TLS is the modern version of SSL<\/strong>, and all the encryption and authentication mechanism you see in your domain works thanks to the TLS protocol.<\/p>\n

How does SSL\/TLS work in practice?<\/h3>\n

When a user enters an SSL\/TLS secured website, a so-called "secure connection" is established between his browser and the server \u2013 marked in the address bar as HTTPS<\/strong> and often a lock icon. HTTPS is simply HTTP running with SSL\/TLS encryption layer<\/strong>.<\/p>\n

During this communication, the SSL\/TLS protocol:<\/p>\n