What is an SSL certificate?
An SSL certificate serves as a digital "passport" that allows data to be transmitted over secure networks - protecting financial and credit card transactions, signups, web access to mail, sensitive information and intranets. It authenticates and encrypts the data transferred through the website to the server.
If you're serious about doing business online, you need SSL. It's the best way to protect user data and defend against identity theft. Many customers will refuse to do business with a website that doesn't have an SSL certificate. Displaying your SSL Site Seal tells customers they can shop with confidence, knowing they're protected. Different certificates provide different levels of validation.