Have you ever experienced an ad popping up as if it could read your thoughts? It happens to me almost every time I bring up topics like spicy sauce or footwear. Strange occurrence? Very unlikely. The not-so-secret ingredient powering all the big brand campaigns you see today is personalization corporate umbrellas, and believe me when I say that they don’t want you looking behind the scenes.

That rabbit hole goes so deep; it’s crazy. Just mentioning a few people in an email would have been sufficient a few years ago. Right now? “Hi, Jeff! Are you still looking for last Tuesday’s extra-wide neon track shoes? The attention to detail is unnerving. Do you have pets, drink a lot of coffee, or prefer pineapple on your pizza? Algorithms can tell. To create digital voodoo dolls that look just like you, brands use data nuggets like clicks and abandoned carts.

Cliches are boring, and no one likes them (except maybe cookies). In the past, marketers would just blast their messages at potential customers and cross their fingers. Sending out mass emails is like receiving a pair of socks as a birthday present these days. Personalization? It’s like getting a surprise puppy, except without the anarchy and fur.

Big businesses make it seem like customization is something you enjoy, but in reality, it’s just a tactic they use to their advantage. An individualized music selection here, a suggested purchase there… All of a sudden, you feel a lightness in your pocketbook and start humming a tune that you had no idea was your vibe. Make each consumer feel special, and they will buy more, return less, and stay longer; this is psychological jiu-jitsu.

Does it have a little flexibility? Without a doubt. You can’t help but notice it once you do. “Was I interested in this before the app informed me about it, or am I just another statistic to them?” is a question that starts to nag at you. If you’re not careful, your purchase history can throw you a surprise party.

It is something that some people wholeheartedly embrace. Virtual butlers are adored by them. Some people are concerned about the privacy of their data and the extent to which their identities are recorded in company databases. “Ah, exactly what I needed!” and “How did you know I wanted socks with llamas on them?” are two very different things.

The best part is that customization isn’t just for big companies anymore; small business owners can take use of it. Thanks to various apps and platforms, anyone can now add a touch of magic to marketing. Writings on paper. Individualized price reductions. Not robotic product suggestions. That is what keeps customers coming back, regardless of how slow your shipping is compared to Amazon.

When you click “add to cart” next time, observe your reaction. Is a company that knows you better than your best friend gently and intelligently guiding you, or are you being yourself? This is not a fictional scenario. Online time is Tuesday afternoon.