Why so many review sites fell over
Between 2022 and 2024, Google rolled out its helpful content system, several "product reviews" updates and, in March 2024, a core update that folded helpful content signals into its main ranking systems. Many affiliate sites built on rewritten manufacturer specs and "best X" lists lost most of their search traffic within weeks. Some never recovered.
The pattern among sites that held up is not mysterious. They showed real use: original photos, measurements, side-by-side tests, honest notes about what went wrong. Google's own guidance, Write high quality reviews on Search Central, asks for exactly this: evidence of first-hand experience, quantitative measurements, explanation of what sets a product apart, and links to multiple sellers where useful.
Search is still the largest source of buying-intent visitors for most affiliate sites, but depending on a single channel is the riskiest position you can take. A durable site treats search as one source among several, and puts real effort into the one channel it truly owns: an email list.
None of this is fast. A useful review of a robot vacuum might take a month of living with it. That is the cost, and it is also the moat: few competitors will pay it.
