Despite some potential warning signs that point to a global economic slowdown, a recession is not that worrisome to most advertisers. According to eMarketer, ad spending continues to increase worldwide, and digital marketing is heading the parade. During 2019, global digital ad investment will reach a 17.6 percent mark of $333.25 billion. For the first time, digital advertising will make up approximately one-half of the world's ad market. In the US, digital ads will account for 54.2 percent of total ad revenue.