I found the evidence of secret of google algorithm evidence 1: I found google can identify funny joke and not very funny joke. and some joke only some special area people can understand why it is very funny than another joke. But Google bot still can "read" and identify, like a human did, and laugh as how human laugh. Google bot know how many laughters should award to a funny joke and rank it higher than not funny joke. evidence 2: Google bot can identify what is cheap, what is expensive. I have a web for one year without build one backlink, but keep on top. Because i cheat google bot by setting price half than normal marketing price. For example, if America shop normally sell iphone 700 USD, then i sell the same type 300 UDS. I never build any backlinks in the past one year. But my web always on the top! Because google bot can identify every product market sell price and compare with yours. That bot can think exactly like how human brain thinking. evidence 3: I changed my selling price by triple than normal marketing price. then..............! Google bot rank me low soon! without anything else changed in the past one year. without one backlink added to or deleted from. Now I understand that google bot are not a bot! It's human!!! As I posted another thread that discovered google algorithm secret to you. It's time to throw those garbage e.g. Scrapbox, GSA SER, Senuke etc. to ashbin now. By draw a conclusion, all current SEO tools are invalide anymore. There are so many people including SEO tool sellers, Google employees here want to ban ban ban me. Because this is the biggest secret that they don't want to be discovered, forever!