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HTTP Status codes are three-digit numbers returned by servers that indicate the status of a web element. First digit of each three-digit status code begins with one of five numbers, 1 through 5.

Our service indicates full path of HTTP requests.

The best length of description should be in 70-320 characters.

The best way is to use only one H1 tag per page.

Text indicating the name of the page.

H1 and Title must match each other

This is a number of signs in page's text. Recommended length of the text is much than 500 sighns.

Many websites serve users from around the world with content translated or targeted to users in a certain region.
Google uses the rel="alternate" hreflang="x" attributes to serve the correct language or regional URL in Search results.

Meta tags are snippets of text that describe a page's content; the meta tags don't appear on the page itself, but only in the page's code.

The X-Robots-Tag can be used as an element of the HTTP header response for a given URL.

The submitted URL can be crawled and indexed by search engine bots. Make sure it really needs to be scanned and visible in SERP. In order to determine what pages need to be closed from crawling by search bots, read our guide at #robotsornoindex.

Check if your webpage is using the noindex meta tag. Usage of this tag instructs search engines not to show your page in search results.

How Google User Experience algorithm evalutes your mobile version.

This rule triggers when Sitechecker detects that text in the page is too small to be legible.

A viewport controls how a webpage is displayed on a mobile device. Without a viewport, mobile devices will render the page at a typical desktop screen width, scaled to fit the screen.
Setting a viewport gives control over the page's width and scaling on different devices.

Plugins help the browser process special types of web content, such as Flash, Silverlight, and Java.
Most mobile devices do not support plugins, and plugins are a leading cause of hangs, crashes, and security incidents in browsers that provide support.

Checks if any external javascript files used in your page are minified. Minified files reduce page size and overall load time.

Minification refers to the process of removing unnecessary or redundant data without affecting how the resource is processed by the browser - e.g. code comments and formatting, removing unused code, using shorter variable and function names, and so on.

Checks if any CSS files used in your page are minified. Minified files reduce page size and overall load time.

Server response time measures how long it takes to load the necessary HTML to begin rendering the page from your server, subtracting out the network latency between Google and your server.
There may be variance from one run to the next, but the differences should not be too large. In fact, highly variable server response time may indicate an underlying performance issue.

Redirects trigger an additional HTTP request-response cycle and delay page rendering. In the best case, each redirect will add a single roundtrip (HTTP request-response), and in the worst it may result in multiple additional roundtrips to perform the DNS lookup, TCP handshake, and TLS negotiation in addition to the additional HTTP request-response cycle. As a result, you should minimize use of redirects to improve site performance.