What does blocking mean when using spontaious improvisation?

In the context of spontaneous improvisation, "blocking" refers to the act of unintentionally or intentionally hindering another performer’s ideas or contributions, which can disrupt the flow of creativity and collaboration. It often occurs when one performer dismisses or negates another's offer, leading to a stifling atmosphere rather than fostering a supportive environment. Effective improvisation relies on building upon each other's ideas, so blocking can diminish the overall quality of the performance. Instead, participants are encouraged to "yes, and…" to promote a more constructive and cohesive interaction.