City council brings development to the local people
It can be one of the more powerful private groups as well.
Yes, City councils and town boards generally consist of several (usually somewhere between 5 and 50) elected aldermen or councillors. 
They govern the city and government area
That is true. Some places calls it Local Governement or council
City council
A city council, town council, town board, or board of aldermen is the legislative body that governs a city, town, municipality, or local government area.
Australia.
Because of the differences in legislation between the states, the exact definition of a city council varies. However, it is generally only those local government areas which have been specifically granted city status (usually on a basis of population) that are entitled to refer to themselves as cities. The official title is "Corporation of
the other four cities form parts of wider districts and do not have their own councils.
United States and Canada.
City councils and town boards generally consist of several (usually somewhere between 5 and 50) elected aldermen or councillors. In the United States, members of city councils are typically called council member, council man, council woman, councilman, or councilwoman, while in Canada they are typically called councillor.
In some cities, the mayor is a voting member of the council who serves as chairman;