Run this experiment: ask Perplexity or ChatGPT a buying question in your industry — "best [service] in [city]", "is [brand] reliable" — and look at the citations. Notice how rarely the cited pages are the businesses' own websites.
AI answers are assembled from three distinct source layers, and each responds to different work.
Layer 1: your own site
This is where GEO work starts, because it's the only layer you fully control. Your site determines whether engines can identify you correctly: what you are, where you operate, what you charge. When an engine already knows about you from elsewhere and needs details, your site is what it quotes — if the details are stated quotably.
But for open questions ("who's good?"), engines are visibly cautious about self-descriptions. Every business says it's excellent; the engine knows that.
Layer 2: third-party authority sources
Industry directories, review platforms, map services, Wikipedia-class references, established media. When engines answer comparison and recommendation questions, these dominate the citations — they're the "neutral witness" the engine trusts precisely because you didn't write them.
The practical work here is unglamorous: getting listed, accurately and consistently, on the sources that already rank for your industry's questions. Same name, same address, same phone everywhere (inconsistent basics read as unreliability to both machines and humans). For local businesses there's a hard dependency worth knowing: the map cards AI shows for "near me" questions pull exclusively from Apple's and Google's merchant registries. No amount of website optimization gets you onto that card — only the merchant profiles do.
Layer 3: community discussion
Reddit globally; Pantip in Thailand; local forums elsewhere. Engines cite these heavily for "real experience" questions — and users specifically trust them because they're unsponsored. This layer is the slowest and least controllable, and that's exactly why it carries weight.
The compliant playbook: find out what's already being said (search your brand and its misspellings), participate openly as yourself where a genuine answer helps, and give happy customers easy reasons to mention you. The non-compliant playbook — buying posts, fake reviews — is a time bomb: platforms and engines both actively detect it, and getting caught poisons the layer you can least afford to lose.
What this means for your plan
A complete GEO effort allocates across all three layers rather than polishing one:
- Site: make yourself accurately quotable (fast, fully in your control).
- Authority sources: get listed and consistent (medium speed, moderate control).
- Community: seed honestly and let time compound it (slow, low control, highest trust).
If your current plan — internal or from a vendor — spends 100% of its energy on your own website, it's optimizing the lane you control most and the engines trust least. Cover all three.