Logos (Images) or Logotypes (Images with Text) are invented to help anyone recognize in an instant a topic, a product or even a service.
Some are old enough to be known by generations like the Coca-Cola Logotype, which can be considered as a logo as it is.
The entire thought running on the mind that triggers senses like the recall of the flavor or the sense of the beverage going down the throat, all these can be triggered by just observing for a fraction of a second this logotype.
But is not only limited to logotypes, in design a well implemented typography can lead to a conversion, a memory, or leave a mind seed planted in someone's mind resonating at deeper levels con consciousness to make the reader come back.
A well implemented and legible use of typography can make a reader in any place read by reflect, for example a person traveling fast on a road, he or she suddenly reads something that catches their attention but they turn around looking where did they read that text, and after looking for it in many signs they finally find it. Yes, they didn't read it directly, nor focused, but in an instant, so fast, less than a quarter of a second, and still catched their attention. To the point to make them try to find the text as they only saw it by an eye-mind reflect.
The text can be anything, but extremely easy to read (legible) as every reader has different mind sets. But when the text find "it's reader", it has the power to trigger emotions, or memories.