Metadata is data about data. It provides information about a certain item's content. For example, an image may include metadata that describes how large the picture is, the color depth, the image resolution, when the image was created, and other data. A text document's metadata may contain information about how long the document is, who the author is, when the document was written, and a short summary of the document. Metadata within a document is typically included in the header of the HTML or XHTML content. This is done using the tag. The tag provides metadata about the HTML document. Metadata will not be displayed on the page, but will be machine parsable. Here are examples of how to achieve the following with the help of Metadata: (i) Stop the page from being listed: You can use the 'robots' meta tag to tell search engines not to index the page. For example: ```html ``` (ii) Set an expiration date: You can use the 'expires' meta tag to specify a date and time for when the document should be considered expired. For example: ```html ``` (iii) Stop the browser from caching a page: You can use the 'pragma' and 'cache-control' meta tags to tell the browser not to cache the page. For example: ```html ``` (iv) Give a context for date so that it can take format DD-MM-YYYY: There isn't a specific meta tag for this purpose. However, you can use JavaScript or server-side scripting to format the date in the desired format. Alternatively, you can specify the date format in the content or title attribute of the meta tag. For example: ```html ``` Please note that the browser or search engine needs to be programmed to understand this format.

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Metadata is data about data. It provides information about a certain item's content. For example, an image may include metadata that describes how large the picture is, the color depth, the image resolution, when the image was created, and other data. A text document's metadata may contain information about how long the document is, who the author is, when the document was written, and a short summary of the document. Metadata within a document is typically included in the header of the HTML or XHTML content. This is done using the tag. The tag provides metadata about the HTML document. Metadata will not be displayed on the page, but will be machine parsable. Here are examples of how to achieve the following with the help of Metadata: (i) Stop the page from being listed: You can use the 'robots' meta tag to tell search engines not to index the page. For example: ```html ``` (ii) Set an expiration date: You can use the 'expires' meta tag to specify a date and time for when the document should be considered expired. For example: ```html ``` (iii) Stop the browser from caching a page: You can use the 'pragma' and 'cache-control' meta tags to tell the browser not to cache the page. For example: ```html ``` (iv) Give a context for date so that it can take format DD-MM-YYYY: There isn't a specific meta tag for this purpose. However, you can use JavaScript or server-side scripting to format the date in the desired format. Alternatively, you can specify the date format in the content or title attribute of the meta tag. For example: ```html ``` Please note that the browser or search engine needs to be programmed to understand this format.

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