You are responsible for your information. It is important to understand how your information is being used.
You may choose to opt-out of your information being collected for targeted advertising. Before racing to click the opt-out button, remember that this does not mean that you will no longer receive advertising. It means that the advertising you receive will no longer be tailored to you based on the information collected about you through your demographic and online behavior.
I often see website banner advertisements for shoes, bags and clothing, and unsurprisingly these are things that I would be interested in purchasing. Targeted advertising is not always a bad thing―if I opt-out of receiving the advertising that is relevant to me, I may end up receiving adverts for lawnmowers which are currently irrelevant to me. In addition, the information is used to send you relevant job opportunities.
The “internet of things” (the name given to connectivity between devices, for example phone to watch to computer to car to home) and big data (the name given to analytics of vast amounts of information) may result in targeting so accurate that you no longer need to remember when to purchase milk or buy your daughter a birthday present as you will be told when to do this, what to buy and how to get it.
Collection of cookies is regulated in some jurisdictions, such as the EU, where websites need to alert you to the collection and direct you to the opt-out facility. Similarly, turning off collection of cookies could result in a lower performance of the website features and functionality because it will not be able to store and remember what you like or which options you use most often. Cookies and other similar tracking technologies may also be used to track information about you on other websites unrelated to LinkedIn and its services.
Mail and syncing
When you sync your address books, LinkedIn stores that information which may include phone numbers and also uses that information to suggest connections to you.