A string (str) in Python is a sequence of Unicode code points which include letters, numbers, symbols, punctuation, etc. Strings implement all of the common sequence operations, along with iteration using the for item in <string> syntax.

Python provides several useful methods that you can use to manipulate strings. These string methods can be used for cleaning, splitting, translating, or otherwise working with the str type. New strings can be created based on method arguments, and/or additional information can be returned. Strings can be concatenated using the + operator or with str.join().

Some of the more commonly used methods include:

• Checking for prefixes/suffixes with startswith() and endswith()
• Altering string casing with methods like upper(), lower(), and swapcase()
• Removing leading or trailing characters from a string using strip(), lstrip(), or rstrip()
• Replacing substrings with the replace() method
• Checking for the existence of a substring with in
• Concatenating strings with the + operator or str.join()

The str type is immutable, so all of these methods will return a new str instead of modifying the existing one.

For more information, you can check out the official documentation.