There’s [essentially] no contentful benefit to any major site’s tracking any more, [almost] nothing is ‘collaboratively filtered” and “personalized” around the content and your interests, [by and large] only around ad placement performance or conversion.

The only remaining arguable benefit is that you will see “more relevant” ads, in other words, instead of seeing ads from whoever pays the most for your [well guessed] demographic, you’ll see endless “retargeted” begging for you to buy the thing you ordered last week.