Making and placing a satellite in an orbit is far more difficult than it  sounds. There are many minute factors that affect the flight of a  satellite. Satellites have different kinds of works like communication,  bouncing signals to different parts of the world, etc. Imagine a world  without satellites, no one will be able to watch television, no usage of  cell phones and many more.
This article will show you how a satellite is assembled, and then it is sent to space. So, this is how it goes: 

 Assembly

 The first part is the assembly of a satellite. Major components like  radio transmitter, navigation system, photo-voltaic panels, system  computers, etc. are put together in one piece. Some small components are  also installed, like batteries and a precise clock (which is really  important).
Once the main satellite is assembled, the focus shifts to  building the lifter, which would take the satellite to space. The  lifter consists of the components like fuel tanks, engines, a set of  decouplers, and some solid-fuel booster too (mandatory). It should be  noted that two engines are installed, first is the big one, which is  used for launch, and second is a smaller one, which is used for  maneuvering in space. Everything is assembled in a building called  Vehicle Assembly Building (VAB). The components of a lifter are very  massive, hence they cannot be installed by hand. Large cranes are used  for this purpose.
The engine has to pass through several pre-launch  tests, before it is installed in the lifter. If it passes these tests,  then it is ready for launch, but if it doesn’t then the whole mission is  aborted.
The shape of the spacecraft has to be precise. Even a  single millimeter of mistake can cause the whole mission to be doomed.  Ferrings, which are outer covering of a satellite, are installed. These  are used because they make the ship more aerodynamic, and it experiences  less atmospheric resistance.
When everything is assembled, and the  scientists are satisfied with the ship, then the satellite and the  lifter are attached together, and it becomes ready for launch. 

 Launch

 The satellite is moved to the launch-pad, using a massive platform with  automated wheels. The fuel tanks are kept empty to prevent the situation  of an explosion if any mishap happens.
Once the combined satellite  and lifter are on the launch-pad, millions of liters of fuel is filled  in the fuel tanks, and launch stabilizers are also installed. When the  tanks are completely filled, the satellite is ready for launch, and the  countdown begins.
At 4, the pipes connecting the fuel tanks to the  engine are opened, allowing the fuel to flow from the tanks to the  engine. At 3, the fuel reaches the engine, where combustion takes place.  At 2, the engine starts burning the fuel to gain thrust. And at 1, the  fuel starts burning at a rapid rate, and the satellite starts ascending.  If nothing bad happens, first part of the launch is successful.
While  it ascends, it faces tremendous air resistance. But once it starts  gaining height, the atmosphere starts getting thinner, and the  resistance decreases too. Before reaching space, the spacecraft has to  pass through Max Q, which is the point where the ship has to experience  the highest amount of aerodynamic stress, and it starts to shudder  violently. If the spacecraft passes the Max Q without any mishap, then  booster are decoupled, and the launch is considered to be successful. 

Out In Space

 No one on earth knows where the atmosphere ends and space starts, but  the scientist take that point as 70 kilometer above the earth’s surface.  
Once the satellite gains the height of 70,000 meters, the people at  the control room on the earth, remotely turn the spacecraft towards the  horizon, and the fairings are then removed. The lifter part, that is  the fuel tanks and the main engine, is decoupled too, and the secondary  engine comes into play.
The nose of the satellite is pointed towards  the horizon so that it starts creating an orbit around the earth. The  supercomputers compute the current trajectory, and shows it to the  people sitting in the spacecraft’s control room. When the satellite  reaches the good height, the secondary engine is shut off. As the  satellite reaches the apogee of the uncompleted orbit, the ship is  pointed towards the prograde direction (the direction of the current  velocity vector), and the engine is started, at full throttle.
Slowly,  the orbit starts forming, and when a circular orbit is achieved, the  secondary engine too is decoupled. The solar panels are opened, and the  satellite is ready to do the work for which it was made.
This was the journey of a satellite from mere parts to space.

Thanks for reading!!