How truthful are advertisements about the things they advertise?

I think the truthfulness of advertisements really depends on the type of product and the platform. For example, ads for tech gadgets or apps often exaggerate their features, especially on short-video platforms like Douyin. As a UI designer, I've noticed how some apps are advertised with flawless interfaces, but when you download them, the experience is far from smooth. On the other hand, ads for local products, like food or daily essentials, tend to be more honest because they rely on repeat customers. I remember seeing an ad for Hangzhou's famous Longjing tea, and the product matched the description perfectly. So, while some ads can mislead, others genuinely deliver what they promise.