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.

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 Store HTTP Cache-Control

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   The cache should not store anything about the client request or server response.

No Cache Content

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   Forces caches to submit the request to the origin server for validation before releasing a cached copy.

Pragma Header - backwards compatibility with HTTP/1.0

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   The Pragma HTTP/1.0 general header is an implementation-specific header that may have various effects along the request-response chain. It is used for backwards compatibility with HTTP/1.0 caches where the Cache-Control HTTP/1.1 header is not yet present.

HTTP Upgrade Header - HTTP/2

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   The HTTP Upgrade mechanism is used to establish HTTP/2 starting from plain HTTP. The client starts an HTTP/1.1 connection and sends an Upgrade: h2c header. If the server supports HTTP/2, it replies with HTTP 101 Switching Protocol status code. The HTTP Upgrade mechanism is used only for cleartext HTTP2 (h2c). In the case of HTTP2 over TLS (h2), the ALPN TLS protocol extension is used instead.

Meta keywords

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   Meta keywords are types of meta tags in the HTML source code of a webpage. They describe the content of a website shortly and concisely,this website is using the following keywords: Gry,recenzje,felietony,publlicystuka,stare gry,PC,Playstation,XBOX,Nintendo,iPhone,iPad,filmy seriale,książki,pop kultura

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.

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 : Blog poświęcony elektronicznej rozrywce, kierowany raczej do starszych użytkowników. Gry, recenzje, felietony, publicystyka, stare gry - wszystko to znajdziecie na GRAstroskopia.pl. Nie uświadczycie u nas trzylinijkowych, bezwartościowych wpisów, piszemy aby czytać i dyskutować. PC, Playstation, XBOX, Nintendo - interesuje nas wszystko co dzieje się na rynku. Od czasu do czasu również filmy, seriale, książki i ogólnie pojęta pop kultura.

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

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.

Post Cache-Control Header

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   this website is using post-heck Cache-Control Header.

Precheck Cache-Control Header

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   this website is using precheck Cache-Control Header.

PHP

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   PHP: Hypertext Preprocessor is a general-purpose programming language originally designed for web development.

PHP 5.6.40

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   PHP: Hypertext Preprocessor is a general-purpose programming language originally designed for web development.

PHP 7.3.29

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   PHP: Hypertext Preprocessor is a general-purpose programming language originally designed for web development.

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.

Gzip Content-Encoding

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   The Content-Encoding entity header is used to compress the media-type. When present, its value indicates which encodings were applied to the entity-body. It lets the client know how to decode in order to obtain the media-type referenced by the Content-Type header.

Apache 2

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   The Apache HTTP Server, colloquially called Apache, is free and open-source cross-platform web server software, released under the terms of Apache License 2.0. Apache is developed and maintained by an open community of developers under the auspices of the Apache Software Foundation.

WordPress DNS Prefetching

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   DNS prefetching is an attempt to resolve domain names before a user tries to follow a link. This is done using the computer`s normal DNS resolution mechanism

StatCounter

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   StatCounter is a web traffic analysis website started in 1999.

English United State - Language

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   this website is using English as a language parameter

English - Language

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   this website is using English as a language parameter

WordPress 3.5

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   WordPress is a content management system based on PHP and MySQL that is usually used with the MySQL or MariaDB database servers but can also use the SQLite database engine.