Two pointers

Question

Can someone explain “Two pointers” technique (Easy to understand)? How do you use ? In Python or Java.

Answer 1

example
find two numbers from array
whose sum is target number
n + m = target
if found return true

pointer1 points to n
pointer2 points to m
in array, pointer means array index
array is sorted

generally:
find value(s) in a datastructure
which meets the condition
and use two pointers rather than one