As posted above an announcement was made in December with detail of the project.

Look at the following links:

https://bitcointalk.org/index.php?topic=2534762.0

https://cointelegraph.com/news/can-a-blockchain-powered-search-engine-take-on-a-leviathan-like-google

https://cointelegraph.com/press-releases/presearch-announces-beta-launch-of-decentralized-search-engine-and-12-million-in-token-sales

https://medium.com/@presearch/presearch-enables-searchers-to-switch-from-google-ae91726ae6a2

I suggest you join the presearch telegram community if you have anymore questions, including procedure to claim free tokens while using the search engine.

Telegram: https://t.me/presearch