Keep-Alive for 15 secs
Download List of All Websites using Keep-Alive for 15 secs
The Keep-Alive general header allows the sender to hint about how the connection may be used to set a timeout and a maximum amount of requests.
Robots No Open Directory Project
Download List of All Websites using Robots No Open Directory Project
These are used if your website is listed in this directorie with information you do not want used in the results pages. This might be the case if you have old, outdated listings that no longer apply. They tell robots not to use information from these sources, and they are optional.
schema.org micro-markup
Download List of All Websites using schema.org micro-markup
Schema.org is a collaborative, community activity with a mission to create, maintain, and promote schemas for structured data on the Internet, on web pages, in email messages, and beyond.
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