Searching over Secure Sockets Layer (SSL) gives you a more secure and private search experience.
Turn SSL on or off
SSL isn't a setting that you need to change. As long as you're searching on https://www.google.com (note the "s" in "https," meaning "secure"), you're using SSL search.
How SSL helps protect your data
SSL encrypts the connection between your computer and Google to help prevent others (like Internet cafes, Internet Service Providers, and Wi-Fi hotspots) from seeing the information you see on the search results page and your login information.
While SSL helps protect your search results, which may include personal results from Google products like Gmail and Google Calendar, it doesn't provide complete security against all potential risks, like viruses and malware. When searching over SSL, it's still good to keep online safety best practices in mind.
SSL doesn't always hide the fact that you visited google.com. For example, when you visit a site from the Google search results page, that site may be able to tell what site you came from or the search terms that you used.
SSL and schools
If you are a school or organization where SSL interferes with parental controls, monitoring programs, or auditing software, learn more about blocking adult content at your school.