I was wondering about below code, as searched result over google as usually everyone does to know.
<meta name="HandheldFriendly" content="True">
So here is the answer: https://stackoverflow.com/questions/1988499/meta-tags-for-mobile-should-they-be-used
Basically, explained its to identify as mobile content for one of the browser, and it also become general standard to for identifying mobile websites.