The NavigableString object represents the text inside of an XML or HTML tag.

University of Chicago

There are four main objects in BeautifulSoup:

- BeautifulSoup
- Tag
- NavigableString
- Comment

BeautifulSoup Objects

https://www.crummy.com/software/BeautifulSoup/bs4/doc/

In BeautifulSoup, the Tag object represents an XML or HTML tag from the original document being scraped. 

The BeautifulSoup object represents the parsed XML or HTML file.