Off-chain computation involves performing operations, calculations, or data storage away from the main blockchain. This can help mitigate issues like high transaction fees, network congestion, and slow processing times. The results or relevant data can then be periodically sent to the blockchain to ensure integrity and synchronization. Off-chain solutions are used extensively in various decentralized applications to facilitate faster interactions and reduce the load on the blockchain. Examples include state channels, sidechains, and utilizing decentralized storage solutions for large data sets that do not necessarily need to be stored on-chain.