Bitcoin Private Keys

[Bitcoin]

Bitcoin Private Keys

I did have these x,y,zpub keys before..but i never knew how to use them?what i was doin was copy & paste them on google search to no avail..no one told me/or i was never taught of their importance or their uses...I had been blocked on Facebook/Twitter/Instagram for asking and  posting Smart Contracts or Bitcoin Transaction Id because i was interested of knowing how they work or how i may get helped and thoroughly understanding them..

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