First, because it is like a welcome word or slogan, you only need to set it to 50 resolution, and the rest should be set according to the actual size.
Second, if it is such a banner, it is not recommended that you use ps, but CorelDRAW is the best. The file is very small, and the format of the place where the banner is made is universal. CorelDRAW 9 is highly recommended, and other formats may be incompatible.
If it is a banner with a tired picture, it is divided into outdoor and indoor.
Outdoor: the resolution can be set to 50- 100, and others can be set according to the actual size.
Indoor: the resolution can be set to 120-200, and others can be set according to the actual size.
It is meaningless to set the file too large, because when you go to an advertising company, the resolution is basically reduced, because the file is too high and too large, and the equipment is prone to problems during transmission, such as crashes. )
If you have any other questions, please leave me a message.