Meaning

The identifier in a python is user define names that are used in the python code.
the identifiers are used to identify the names that are used in the program. examples variable name, function name, module name and other it is name like box store the some value . then later called anywhere in the program

Rules

The identifiers having the some rules to use program code

The first character must be alphabetic and letters

The keywords cannot be allowed

The uppercase and lowercase are Distinct

Special character not allowed except underscore(_)

The white space not allowed

The 512 characters are allowed

Examples

variables:-

dars_name="coder"

functions:-

function dar_name{
return a+b
}