Finding the Early Adopters

My personal understandance is When iam looking up Shoes then when iam still on there a Ad pops up saying get shoes from this and that store. Its kind of cool but then its freaky cause theres people watching what you look up on the computer. So any thing you look up most likely a Ad pops up saying where you can get this item from and etc.when i read the article i was reading the part about youtube and what i read was that more than 25 million videos are being watched per day and alot of other people uploading and downloading things from the internet.