How does this effect influence what products or services you might buy, especially those promising 'personalized' results?

Many products and services, from diets to dating apps, promise a 'personalized experience' based on some initial input. While some personalization is real, others might use Barnum-like statements to make you feel understood, increasing your trust and likelihood to buy. Being aware of this can make you a savvier consumer, less swayed by general flattery dressed up as insight.