This statement suggests that advertisers are investing more money into promoting their products or services through retailers like Walmart and Amazon, as television advertising is potentially becoming less effective. This could be due to a variety of factors. People are generally shopping more online, especially with the influence of the Covid-19 pandemic, and consumers tend to watch less live TV and more streaming platforms, which often have limited or no advertising. Furthermore, advertising through online retailers can offer targeted marketing based on consumer buying habits and preferences.