I largely get ads for things I already have bought. Otherwise, it's really general demographic stuff that doesn't strike a chord. I assume it's because I don't

I largely get ads for things I already have bought. Otherwise, it's really general demographic stuff that doesn't strike a chord. I assume it's because I don't really browse for buyables unless I have the intent of buying something immediately. On a personal level, I fail entirely to understand the value proposition in web advertising.