Meta Description
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A meta description is a 160-character snippet, a meta tag in HTML, that summarizes a page`s content. this website is having meta description of the following : Il CNCA è una federazione a cui aderiscono 260 organizzazioni che operano nei settori del disagio e dell’emarginazione.
W3C SVG
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is an XML namespace, first defined in the Scalable Vector Graphics (SVG) 1.0 Specification and subsequently added to by SVG 1.1, SVG 1.2 and SVG 2.
SEO Robots : Allow to index and follow website links
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Meta robots tag is a tag that tells search engines what to follow and what not to follow.
schema.org micro-markup
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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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Vary Header check for User-Agent
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When using the Vary: User-Agent header, caching servers should consider the user agent when deciding whether to serve the page from cache
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Vary Header Accept-Encoding
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The Accept-Encoding request HTTP header advertises which content encoding, usually a compression algorithm, the client is able to understand. Using content negotiation, the server selects one of the proposals, uses it and informs the client of its choice with the Content-Encoding response header.
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XFN 1.1
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XFN is a technical term that is an acronym that stands for “XHTML Friends Network.” This is primarily used by websites that want to create a series of referral links between other websites in order to boost SEO ratings.