In a television series, you get several episodes, one after the other. A series circuit is similar. You get several components one after the other.
If you follow the circuit diagram from one side of the cell to the other, you should pass through all the different components, one after the other, without any branches.
In a series circuit, if a lamp breaks or a component is disconnected, the circuit is broken and all the components stop working.
Series circuits are useful if you want a warning that one of the components in the circuit has failed. They also use less wiring than parallel circuits.
The current is the same everywhere in a series circuit. It does not matter where you put the ammeter, it will give you the same reading.
The current in a series circuit depends upon the number of cells. If you make the cells face in the same direction, the more cells you add, the greater the current.
If you put more lamps into a series circuit, the lamps will be dimmer than before because less current will flow through them.
You might think that the current gets less as it flows through one component after another, but it is not like this. The current is not used up by the components in a circuit. This means that the current is the same everywhere in a series circuit, even if it has lots of lamps or other components.