In all Website Builder plans any data transmitted from your site will be encrypted using a SSL (Secure Sockets Layer) certificate. Your SSL will establish an encrypted link between your web server and the browser of the person visiting your site. This means that all data will be kept private; which is important if you want visitors to your site to be safe. If you want to sell products or services in your store, you will want to have a SSL since it protects credit card and bank numbers from being intercepted by hackers. All of the site builders included here let you put Facebook Like and Twitter Follow buttons on your pages, and some even let you display feeds from the social networks. Some give you help building a Facebook Page and tying it into your site design and updates. Many products offer some sort of SEO tool, but too often this is just a form on which you can enter meta tags. You're mostly left to wrestle with that black magic known as SEO for yourself. It's very important to submit and verify your site to the search engines, unless you don't want anyone to find it! Best FREE Website Builders!