‘Do Not Track’ button — what it will and won’t do

“Do not track” buttons have been a mixed bag in the past because while they have let advertisers know that users don’t want to be followed across the Web, not all advertisers had agreed to abide by the request. Consumer Reports pointed out that the “do not track” technology won’t protect consumers when, for example, they are signed into Google services if they have not opted out of having Google track their Web history. The same is true for social networks such as Facebook, if signed-in users choose to tell the service that they “Like” a product or use their Facebook log-in to connect to another site.