Which is bigger, the advertising umbrella or the umbrella

On a rainy day, pedestrians are walking along the road with colorful umbrellas. What is this umbrella and what is that one. People often say that advertising umbrellas and umbrellas. What is the difference between the two? Advertising umbrellas are still umbrellas when they are large in scope?
Advertising umbrellas are umbrellas printed with the corporate logo for promotion,Publicize the brand image of the enterprise, and let more users know and understand the existence of the company. Many real estate and automobile companies use this method to attract customers. Whether it is an advertising umbrella depends on the purpose and printed content of the umbrella? Some umbrellas are information content of printing enterprises. If they are used for retail, they are not advertising umbrellas.
The umbrella, with the word "rain", is obviously used as a shelter. Common umbrellas have the function of covering the rain, so most of the umbrellas we see are umbrellas. But if the definition of "umbrella" is more detailed, it is an umbrella with good water resistance. Use special super water splashing cloth. In rainy days, the cloth will dry as soon as it is thrown. This is an authentic umbrella. However, the cost of such an umbrella is too high. Ordinary people don't need such a high-quality umbrella at all.