What is GDP 148?
BIP 148 is a user activated soft fork (UASF) in Bitcoin that forces the use of Seguated Witness or SegWit protocol, a change that relates to a Bitcoin block size problem by separating the digital signature from the original section of the block . As a soft fork, BIP 148 does not naturally divide the network. BIP 148 requires Bitcoin miners to signal for SegWit, which means they are ready to use blocks with the SegWit protocol.
In the summer of 2017, BIP 148 was proposed by members of the Bitcoin community. Upon implementation, Bitcoin miners recovered and signaled support for SegWit, which prevented further action. However, other events like a mine activated fork are on the horizon for Bitcoin. Essentially, forks happen when there is no node consensus on Bitcoin when everyone does not agree to do the same. Because Bitcoin is an unregulated, decentralized system, there are a number of inconsistencies that lead to forks. Hard forks can divide the network. For example, the appearance of Bitcoin Cash is an example of a hard fork that resulted in two separate Bitcoin cryptocurrencies.
Understanding BIP 148 and related efforts means understanding how Bitcoin miners and users work. Miners look for blocks available and have their own incentives. Users can suggest a rule that miners do not want to implement. The rest is largely semantic juggling related to trying to build consensus and control the inherent chaos of an unregulated cryptocurrency system.