Block Version refers to a specific format or set of rules used to structure a block in a blockchain. Each block in a blockchain contains various components, such as transaction details and metadata. The Block Version identifies the type of block, indicating what features or updates it may support.

Different block versions may enable new functionalities or improvements, such as greater transaction throughput or enhanced security measures. Upgrades to a blockchain network can be introduced through changes to the block version. These adjustments can result from community consensus or deliberate upgrades pushed by developers.

When a network adopts a new block version, nodes must update their software to accommodate the changes. Failure to do so can lead to compatibility issues, where some nodes may not recognize new block formats. This can result in forks, where divergent versions of the blockchain emerge.

Overall, Block Version plays a crucial role in how blockchains evolve and maintain their resilience while adapting to new challenges.