Vah, 'Concerted Action' Ka Matlab Kiya?

Maine textbooks padhe, lekin yeh term to koi samajh nahi aaya. Sab kehti hain ki yeh "mutual or collective action" hai, lekin koi real-life example dikhate hai? Maine suna hai ki kuch company employee ki salary reduce karne ka plan banate hain, jabki do company ek dusri ke saath milke kaam karte hain. To yeh ek example hai ki concerted action ka matlab kya hai? Kya yeh un sab employees ke liye applicable hai jo is plan mein join kar rahe hain? Jab tum log mock tests dete ho, main apne Judicial Services exam ke liye taiyar karna chahunga. Plz share kuch clear real-life examples.