What it means
Astroturfing is manufacturing fake grassroots popularity to manipulate algorithms and mislead consumers. It covers fake reviews, planted mentions, and sockpuppet accounts that pose as independent users while serving a brand. The name plays on AstroTurf, fake grass, because the support looks organic but is staged. In search and marketplaces, astroturfing shows up as fabricated reviews and ratings meant to inflate a product's standing.
Why it matters
Astroturfing matters because it sits at the opposite end of how you actually earn brand authority. Marketplaces rely on user-generated reviews to build trust and relevance, so fake content attacks the exact signal that makes them work, and any platform that can be gamed for advantage eventually will be. Google fights billions of spammy pages, and platforms that fail to cull fake reviews lose the trust that algorithms and AI answers reward.
Picture a software vendor that buys 50 glowing reviews overnight on a review marketplace. A vetting system flags the unnatural spike, removes the fake entries, and the vendor ends up with less credibility than if it had earned 10 real reviews slowly.
How to use this knowledge
Earn authority, do not fake it. Build real reviews and mentions through product quality and incentives, since manufactured popularity gets caught and erodes trust.
Vet user-generated content. If you run a platform, assume it will be spammed and put QA and spam filters in place to cull fake user content and reviews.
Reduce the incentive to game. Design review flows so honest contributions are easy and fake ones are costly, removing the advantage that invites manipulation.
Protect your trust signals. Treat authentic reviews as a moat, because high trust signals are what AI answers and search engines pull from.
Growth Memo guidance
At G2, we're not facing the same extent because we vet all reviews but some companies still try to game the system a bit. It's just super hard to control UGC (user-generated content) at scale if you don't vet every instance or entry.
There is a law on the internet for this: if someone could gain an advantage by spamming a platform on the internet, it will be spammed.
In the era of AI-generated consensus content, UGC-based marketplaces have an edge, especially ones with high trust signals that cull out fake user content and reviews.
Web spam — the broader category of manipulation that astroturfing belongs to.
User-generated content (UGC) — the real reviews and listings astroturfing tries to imitate.
Brand authority — the legitimate standing astroturfing fakes instead of earning.
Trust signals — the credibility markers that vetting protects and astroturfing attacks.
Marketplace SEO — the model most exposed to fake reviews because it runs on UGC.