EOS Public Key Maping

Hello Everyone

Hope someone can clarify for me what is meant by Mapping my Eos Public Keys?

So far I have bought some EOS through MEW and claimed them so they are sowing in my MEW, but I went over the instructions again and at the end Where it says under:

"Technical Risks

This EOS Token Distribution Contract runs on the Ethereum network; therefore, you need to be aware of certain things."

It lists 4 points and number (4) four says:

"Failing to register a public key for your Ethereum account

If you hold EOS Tokens in an Ethereum account and fail to register a public key or lose the private key that maps to your registered public key, then your EOS Tokens will not be part of the snapshot when the EOS Tokens become fixed and non-transferable on the Ethereum blockchain. If and when someone launches a blockchain adopting the EOS.IO Software there may be less than 1 billion EOS Tokens outstanding after taking into account those who fail to register a public key."

And further down it proceeds to instruct you on HOW to in :

"Advanced Participation

Register Your Public Key
At any time a user can map their Ethereum address to a public key in one of the following formats:

1. EOS Public Keys - EOS4yfYEjUodfs.......DfavaddbvD
2. Steem Public Keys - STM4yfYEjUoey4.......UaSt2Sx9W4
3. BitShares Public Keys - BTS5WaszCsqVN9.......Wz47B3wUqa "

Someone must be able to explain to a Non-Tech person the meaning and what to do, Please, I know that I am not the only one scratching my head in Awe wondering, WOTS ITABOUT !

This could be a cause for some Heavy Duty Anxiety!

Many, many thanks Clever Person, whoever you are.

Theyo