Answers for "title() is used for in tkinter"

tkinter window title

from tkinter import *
window = Tk()  # Create instance 
window.title("This is the window title!!!")  # Add a title

python tkinter frame title

from tkinter import *

root = Tk()
root.title("Title of the GUI")
root.geometry("500x400") # (length x width)
root.pack()
root.mainloop()