Python For loop is used for sequential traversal i.e. it is used for iterating over an iterable like string, tuple, list, etc. It falls under the category of definite iteration. Definite iterations mean the number of repetitions is specified explicitly in advance. In Python, there is no C style for loop, i.e., for (i=0; i<n; i++). There is “for in” loop which is similar to for each loop in other languages. Let us learn how to use for in loop for sequential traversals. 

A for loop is a fundamental control flow structure in Python that allows you to iterate over a sequence of values, such as a list, tuple, or string. The for loop executes a block of code for each element in the sequence, which makes it a powerful tool for processing and analyzing data.

The syntax of a for loop in Python is straightforward. You start with the keyword "for", followed by a variable that represents the current element in the sequence. Then you use the keyword "in" followed by the sequence itself. Finally, you add a colon at the end of the line, and indent the code that you want to execute inside the loop.

Here is an example of a for loop that iterates over a list of numbers and prints out each value: 

numbers = [1, 2, 3, 4, 5]
for num in numbers:
    print(num)

In this example, the variable "num" takes on each value in the list "numbers" one at a time, and the print statement outputs each value to the console.

For loops are extremely versatile in Python, and can be used for a wide range of applications, such as data analysis, web scraping, and automation. Learning how to use for loops effectively is an essential skill for any Python programmer.