Age HTTP Header - Original Server Response

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   The Age header contains the time in seconds the object has been in a proxy cache.

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.

Must Revalidate HTTP Cache-Control

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   Indicates that once a resource has become stale (e.g. max-age has expired), a cache must not use the response to satisfy subsequent requests for this resource without successful validation on the origin server.

NO Transform HTTP Cache-Control

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   No transformations or conversions should be made to the resource. The Content-Encoding, Content-Range, Content-Type headers must not be modified by a proxy.

Cache-Control Header Max-Age

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   Specifies the maximum amount of time a resource will be considered fresh. Contrary to Expires, this directive is relative to the time of the request. this website is having max-age=0 secs.

X-Cache HTTP Header

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   The resource was not in the website cache, and was pulled from the origin server like Varnish servers.

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 : Explain-It-Arium | Hallo und Willkommen zu nasoboems Explain-It-Arium - T-Shirts Hier im Explain-It-Arium glauben wir daran dass: • Bildung für alle kostenfrei sein soll • Jeder ein Anrecht auf Bildung hat • Bildung dazu da ist die Welt zu begreifen • Um die Welt zu begreifen man die Zusammenhänge verstehen muss • Verständnis der Zusammenhänge wichtiger ist als bloßes Faktenwissen • Verständnis der Zusammenhänge zu wahrer Erkenntnis führt • Wahre Erkenntnis uns die Welt mit anderen Augen sehen lässt • Erkenntnisgewinn und die Welt begreifen Spaß macht Explain-It-Arium ist ein Youtube-Kanal und soll eine freizugängliche kostenlose Bildungsplattform sein die Allen ermöglicht die Welt zu begreifen neue Erkenntnisse zu gewinnen und Spaß am Lernen zu haben. Dabei legen wir besonderen Wert auf das Verständnis und weniger auf Faktenwissen. Zeig deine Unterstützung mit dem Kauf des Explain-It-Arium - T-Shirts.

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.

German - Language

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   this website is using German as a language parameter

Nginx 9.5

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   Nginx is a web server which can also be used as a reverse proxy, load balancer, mail proxy and HTTP cache. The software was created by Igor Sysoev and first publicly released in 2004. A company of the same name was founded in 2011 to provide support and Nginx plus paid software.

SPF

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   The Sender Policy Framework (SPF) is an email-authentication technique which is used to prevent spammers from sending messages on behalf of your domain. With SPF an organisation can publish authorized mail servers.

Character Encoding :utf-8

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   This website is using utf-8 character encoding in HTML , character encoding is used to represent a repertoire of characters by some kind of encoding system.

Viewport - initial-scale

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   The viewport is the user`s visible area of a web page. The viewport varies with the device, and will be smaller on a mobile phone than on a computer screen. Before tablets and mobile phones, web pages were designed only for computer screens, and it was common for web pages to have a static design and a fixed size.

Viewport - Mobile compatible

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   The viewport is the user`s visible area of a web page. The viewport varies with the device, and will be smaller on a mobile phone than on a computer screen. Before tablets and mobile phones, web pages were designed only for computer screens, and it was common for web pages to have a static design and a fixed size.

Viewport - Width

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   The viewport is the user`s visible area of a web page. The viewport varies with the device, and will be smaller on a mobile phone than on a computer screen. Before tablets and mobile phones, web pages were designed only for computer screens, and it was common for web pages to have a static design and a fixed size.

Varnish

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   Varnish is an HTTP accelerator designed for content-heavy dynamic web sites as well as APIs. In contrast to other web accelerators, such as Squid, which began life as a client-side cache, or Apache and nginx, which are primarily origin servers, Varnish was designed as an HTTP accelerator.

Twitter Cards

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   With Twitter Cards, you can attach rich photos, videos and media experiences to Tweets, helping to drive traffic to your website.

Server partial requests support

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   The Accept-Ranges response HTTP header is a marker used by the server to advertise its support of partial requests. The value of this field indicates the unit that can be used to define a range.