Historically, the West Coast of Mexico was important because trade from Spain's Asian empire passed through the ports of that coast. Today, the West Coast is more important as a tourist destination.
The West Coast of Mexico includes some of the most important tourist resorts both for foreign tourists and for Mexicans on vacation. It includes such famous destinations as Acapulco, Mazatlan, and Puerto Vallarta.
Economically, then, the main importance of Mexico's Pacific Coast is as a tourist destination. Of course, there are other economic activities such as fishing that go on in the coastal areas of these states, but the area is best known for tourism.
The Pacific Rim commerce. Freight arrives in Manzanillo, Lazaro Cardenas where there is a rail line to Mexico city. Acapulco where cars that are made in DF are shipped out to several points in South America. Shipments of Chinese goods arrive in Acapulco and Lazaro Cardenas destined for distribution in DF. Tourism is an important factor.