The catalog is the showcase of business products. An appealing catalog conveys the lifestyle the product can grant or it can help the customer to achieve a lifestyle they want.
Catalogs are designed for Business to Business (B2B) trade or for Business to customer (B2C) sales, and for both of them a different designing and content is required as per the target customers.
Prioritize or centralize the product on catalog, using high resolution, relevant and big images. Images should not be scattered or with bad background. It is preferred to have photo session of all the products with some good photographer.