If you are concerned about someone gathering information about you without you knowing it, the newest browsers have many new features to protect your privacy. Be sure you are using one of the latest versions -- they are all free -- and check out the privacy features. For example, Microsoft Internet Explorer 8 and above has InPrivate Filtering that helps prevent website content providers from collecting information about sites you visit. To turn it on, select Tools/InPrivate Filtering. You can choose to stop anyone from invisibly gathering information about you, or selectively decide who you will allow.
Mozilla Firefox, another popular Web browser, also provides a good array of security features, such as virus protection, and phishing protection. To view your Firefox security settings, go to "Tools," and then select "Options." Next, select the "Security" tab. Security options are turned on by default, but it is a good best practice to check that "block reported attack sites" and "block reported Web forgeries " are selected before your kids start browsing.
You also have to be selective to whom you willingly give your personal information. There is a wealth of free content and information on the Web, but much of the time to get access to it you must identify yourself at least with an email address. If you really want know how your information can be used, check out the privacy statement. Look for sites that agree to not sell your information to others, and allow you to opt out of letting them send you advertising provide your information to third-party marketers.
See JustAskGemalto.com's tips on privacy and social media sites: