Keyword Staking is a revolutionary new concept being pioneered by Presearch as it builds the world’s first decentralized search engine framework.

With Presearch Keyword Staking you choose a keyword (ex. I choose "Stakedwallet.io") and then stake PRE tokens that you’ve purchased (for example on Kucoin: 1000 PRE costs about 15 USD) or earned against that term. You can then create an ad that you link to the website of your choice. 

At first you have to register on Presearch (it is free and you will receive 25 PRE bonus), you can also download it from playstore (Chromium / android). You will need to have a minimum of 1000 PRE to create your first free advertise. Then after stake your PRE (you can stop or modify your add at anytime, and if you don't wish to continue, you can withdraw your 1000 PRE and trade them again on Kucoin.

After uploading you can check your keyword on Presearch webpage : 

And here is the Magic :

Your add appears on the top of the search engine, and for free !!!