Who can see what this sentence means?

Ha. Tastes great and less filling were slogans used by American brewers in TV advertising debates in the 1970s and 1980s.

At that time, the American Miller Company launched Miller Lite, a light beer. This type of beer has a light taste, but you don’t feel full so quickly, nor do you get drunk so easily, and you can drink more, so it is very popular among Americans. The innovative advertising slogan used was "tastes great, less filling". This slogan mainly focused on "less filling" and was used to attack dark beer, a beer with deep color and strong taste. Dark beer has always emphasized "tastes great" to fight back against lite beer.

This common word has become an American mantra, used to describe verbal arguments and boring arguments.

The author compares the debate between Senators Dianne Feinstein and Michael Huffington to the debate on TV commercials, which is both funny and boring.