404 – “Google search really has been taken over by low-quality SEO spam, according to a new, year-long study by German researchers. The researchers, from Leipzig University, Bauhaus-University Weimar, and the Center for Scalable Data Analytics and Artificial Intelligence, set out to answer the question “Is Google Getting Worse?” by studying search results for 7,392 product-review terms across Google, Bing, and DuckDuckGo over the course of a year.  They found that, overall, “higher-ranked pages are on average more optimized, more monetized with affiliate marketing, and they show signs of lower text quality …  we find that only a small portion of product reviews on the web uses affiliate marketing, but the majority of all search results do.”  They also found that spam sites are in a constant war with Google over the rankings, and that spam sites will regularly find ways to game the system, rise to the top of Google’s rankings, and then will be knocked down. “SEO is a constant battle and we see repeated patterns of review spam entering and leaving the results as search engines and SEO engineers take turns adjusting their parameters,” they wrote…”