This document analyzes the market structure and competitive environment of the online advertising industry in Taiwan. It discusses trends showing increasing internet usage rates and outlines the client profiles and services provided. Using Porter's five forces model, it finds the industry has low concentration, high rivalry among competitors, strong buyer bargaining power, weak supplier bargaining power, and threat of substitution from print media. The document's company focuses on product differentiation, vertical integration alliances, and controlling quality to compete in this emerging fragmented market.