The top global advertising firms have had a lot of mergers in recent years. why?

This is because of the rampant advertising activities that can be done through social media and other platforms related to the internet and the global network. The world has become too small already because of the presence of technology in the form of internet connection. The need for advertising firms is no longer that high because with just a click of a button you can already create your own advertising material and reach as many people as you can. This is the reason why a lot of top global advertising firms have seen a lot of mergers in the recent years of advertising.