Definition - What does Summation mean?
A summation is a closing statement or argument that is made by a lawyer or a judge at the end of a trial, before the jury deliberates.
The purpose of a summation is for lawyers to give the jury a final summary of their argument, before the latter goes into deliberation to determine whether or not the defendant is guilty.
Justipedia explains Summation
When a judge makes a summation, he or she is not trying to persuade the jury to vote in one direction, but is instead trying to summarize all of the evidence in the case for the jury.
Lawyers and judges typically want the jury to clearly understand the arguments made and the evidence presented in the case. That way, the jury can have a more accurate base from which to make their decisions about the verdict.