Let’s say you access an online service provider like your bank, an online store, Paypal, your email, or your private blog. These can include your credit card numbers, usernames, and passwords. If that site isn’t protected with the proper encryptions, then those other computers between you and the server can see your private information.
The reason is that the information you send on the net is passed along many computers to get to the main server of whatever website you opened. You may wonder if this security certificate is actually that important for websites and the answer is: Yes, very much so. A security certificate acts as a sort of identification tool that signals users that a website is secure. One warning often received while browsing online is about security certificates.