Turing Machineis abstract model of a computer for performing algorithms
It consists of an endless tape and head. It is located in one of the possible states.

Depending on the field on the tape and its state
the machine can move to another state, save something on the tape
and move to the next field on the tape.

This model is a very abstract but is still similiar
to architecture of modern computers
with a processor, memory, disk and software.