HTML <frame> tag is used to divide a webpage into multiple sections or frames within a <frameset>. Each frame can contain different web pages. Every individual <frame> in a <frameset> use different attributes, like scrolling, border, the ability to resize, etc.
This tag has been removed in HTML5 and it should not be used anymore. You can use HTML <iframe> tag instead of this. It is not used by the modern web page of HTML because its required Start and end tag. As it always come with <frameset> tag so there is no need to use <body> Tag for this.