In the past 10 years, the growth of Internet users has slowed down significantly, causing the increase in traffic to decline; the fragmentation and authenticity of user catalyst channels have weakened the conversion rate of Internet advertising, making the competition for traffic stock more difficult. Therefore, as the Internet demographic dividend gradually fades, the cost of obtaining high-quality traffic through mainstream media continues to rise, and the difficulty of advertising conversion has also increased. However, with the gradual integration of big data, the continuous improvement of technical capabilities, and the continuous improvement of public transportation media advertising that is connected with consumers’ life trajectories, their value has become more prominent in the second half of the Internet when online traffic growth has been sluggish, and they have gained the attention and favor of advertisers.

In 2020, the public transit media went through the most difficult year. Fortunately, with the successive introduction and implementation of policies such as epidemic prevention and control and vaccination, in 2021, public transportation media will have the opportunity to make a comeback. As a relatively special form of urban advertising, transit media advertising is one of the most effective media for establishing connections between brands and consumers due to its highly targeted and high-profile nature. Therefore, the scale of the public transportation media advertising market will still maintain a very stable growth trend in 2021. Public transport media advertising has always been born in life scenes, and has also changed its development trajectory with the extension, innovation and replacement of scenes.