I see lots of people talking about these things
what is it, and what is better ?
there is also something like Bob(Number like 100) what the hell is that ?
BIP* Bitcoin Improvement Proposal;
https://en.bitcoin.it/wiki/Bitcoin_Improvement_ProposalsXT is dead, forget about it. The block size limit how many transaction per second the network can handle. Some people have been pushing to fork BTC to their own altcoin so they become the core dev or some such Drama.
Just wait, when we can't handle all the TX being push into the network, people will actually start voting for the block size increase.
For *you* this means absolutely nothing. You may notice a rise in TX fee when we are near the limit. Thats about it.