"Pointless tasks" refers to activities or jobs that do not have any real purpose or value. These tasks do not contribute to achieving a goal or producing results that matter. They are usually seen as a waste of time and effort. Full definition
Many scenes feature seemingly random characters carrying out — in great detail — seemingly pointless tasks. (awardsdaily.com)
You'll spend countless hours performing pointless tasks, yet you'll only spend a short time being rewarded with sections that include blasting through the game's set pieces. (monstervine.com)
Don't waste your time and your client's money on pointless tasks. (abovethelaw.com)