External Style Sheet
External style sheets are external files where you place all the stylesheets that you want to use on your website. This file is later linked to the HTML. This helps in modifying or changing the styles all in one place and applying styles to multiple web pages.
CSS (Cascading Style Sheets) are used to apply styles to a web page. An external stylesheet is an external CSS file similar to the webpage. External style sheets are useful when applying styles to multiple web pages. This file can be linked to multiple web pages. This helps in maintaining the same style across various web pages.