What behavior does the <big> tag usually have on text?

The tag is specifically designed to increase the font size of the enclosed text. When this tag is used in HTML, the browser interprets it as an instruction to render the text larger than the surrounding content. This tag is useful for emphasizing specific text by making it visually more prominent through increased size. Despite the tag being considered somewhat obsolete in modern HTML practices, its intended purpose remains to enhance the size of text rather than alter its style in other ways, like making it italicized or bold.