At present era, browsers widely using the HTML tags for better readability of web pages for humans. The new specifications of HTML, HTML5 provides a very good mechanism to define a structure in web pages. The mechanism popularly known as microdata is easier to implement than the other formats such as microformats and RDFa. These structures are machine-readable which are providing the software programs to search for specific types of information. Recently, some of the popular search engines such as Google, Yahoo and Bing joined hands to support microdata. But now JSON-LD is a growing description at present. Schema.org, a collection of terms that webmasters can use to markup their pages to improve the display of search results. This paper covers a way for content description metadata through some examples like Microdata, RDFa, Microformats, JSON-LD, Rich Snippets etc
