The people's jurors participate in court trials.Except for ineligibility for serving as presiding judge, they share equal rights with other judges according to law.
The secrecy prevents any future jury members from having formed an opinion about the case before the facts are known; and it protects the reputations of people who may have been wrongfully or unnecessarily accused of a crime.
They were concerned that if there wasn't the type of evidence in a case that you would see on the TV that the jurors would think, " Well, it's a weak case."
There were emojis in the transcript that was being read as evidence and his attorneys argued that it was critical to the case that jurors be shown the emojis.