I got summoned for jury duty?

Keith is correct.  Once you do the questionnaire, unless they disqualify you for some reason, sometime in the coming months you will receive a letter with the date(s) you are expected to report for jury duty, together with instructions about where to report.  The day will probably begin with a briefing by the clerk of the court or possibly one of the judges about what you will be doing that day.

I received a questionnaire for jury duty in early 2020 explaining that I would be serving sometime during 2020.  Then the pandemic started, and many jury trials were cancelled or postponed and that was that.  I never heard if they would want me in 2021--I suspect not. 

I've done jury duty several times in my life, and considered it an interesting experience.  

Check the summons you got in the mail and read it for instructions.  If you can't find any, then call the courthouse.

Congratulations on jury duty.  It is an honor and a privilege.

They will send you a letter telling you when to appear.