So who can imagine the internet without cookies ?

Cookies are important to many websites especially ones that in order to function properly and show content has to assign the cookie, Most search engines accept some cookies depending on its nature, One problem would be if the cookie is generated according to a form content on a page on your website, in this case don't expect the search bot to take the cookie and if this cookie is required for some other page to be seen, don't expect that page to be indexed.