Emission refers to the rate at which new coins or tokens are created and released into circulation according to a blockchain's protocol rules. Emission schedules define how many new tokens are generated per block or time period. Bitcoin has a decreasing emission schedule due to its halving mechanism, while other blockchains may have fixed, inflationary, or deflationary emission models. Understanding a project's emission rate is crucial for evaluating long-term tokenomics and potential inflation pressure.