Do you know how many invisible counters on website pages to spy on you? Moreover, they meticulously collect the information about you and your actions on the website, but they also slow down the loading of pages. This information is necessary for advertisers (for targeting) but who knows how it could be used against us.
By blocking such scripts we can protect ourselves. Moreover, it is very easy to do.
Just install plugin Disconnect.me which exists for all most popular web browsers. And it is FREE! This plugin will show you information about hidden tracking codes and automaticly block it. If you want you can add website to white-list.