These cookies are not used to follow your surfing behaviour at other websites. Moreover, these cookies are necessary to ensure the correct function of our website. Without those cookies, the website would simply not work correctly.
A cookie is simply a piece of technology to remember something about you.
Without cookies, a website is like a goldfish who forgets everything the moment you visit a new page. As soon as you visit a new page, it does not remember who you are.
This could be a good or a bad thing. Without a memory, a website cannot do much. It cannot let you log in, because it forgets who you are. It cannot let you buy anything, because it forgets what you want to buy.
You can completely turn them off, which is a little bit like banning all music to avoid a certain album. Many websites will simply no longer work.
A better option would be to turn off third-party cookies, which would mean most websites can no longer share information about you. Some browsers - like Safari - do this automatically.
And finally, you could inform yourself about the websites that interest you. Most websites have a policy explaining what they do.