> Twitter's ad targeting depends on knowing what a user looks at, and how their network of connections/follows lines up with other user segments. I never under

> Twitter's ad targeting depends on knowing what a user looks at, and how their network of connections/follows lines up with other user segments. I never understood this argument for tracking users, google and twitter already know what the user is looking at as they are serving them the content directly. Why don't they base ads on what I'm looking at now? If I am looking at posts about dogs why not try to sell me something for my dog? Instead they seem to want to know what I was doing last week so they can serve me ads based on that, but there is no point in showing me adverts for shoes this week as I already bought them last week! My point is as some one who works in advertising it's more effective to target people on the content they consume today rather than base your targeting off of data you gathered last week, by then its too late.