The Alexa Traffic Rank gives a statement about the popularity of the tested website.
"The traffic rank is based on three months of aggregated historical traffic data from millions of Alexa Toolbar users and is a combined measure of page views and users (reach). As a first step, Alexa computes the reach and number of page views for all sites on the Web on a daily basis.The main Alexa traffic rank is based on the geometric mean of these two quantities averaged over time (so that the rank of a site reflects both the number of users who visit that site as well as the number of pages on the site viewed by those users)."
Source and further information: www.alexa.com.
There are either no data available regarding a traffic ranking for the tested web site, or the ranking needs definite improvement.
HTML is a mark-up language used to create websites, and is independent of platforms.
"HTML is not a programming language, since HTML does not allow to, say, control a robot, set a variable or programme a game." (Quelle)
The display of invalid or incorrect documents depends on the software reading them (browser, roboter, screenreader, etc; see above). However, the display will vary greatly depending on the software, and this can lead to errors, often without the knowledge of the website manager, since it is impossible to test the website against all updates of all the software.
Non validated HTML source text can cause high costs, especially if it causes the software to look for an error or if the functionality and therefore the user experience is impacted.
Further information:
The validity of the HTML source text can be checked with a so-called 'validator'.
Examples:
Further information
http://blog.antikoerperchen.de/beitrag/28/validierung-wozu-warum-valider-html-code-wichtig-ist.html
Acronyms:
HTML: HyperText Markup Language
The tested website appears to use XHTML, but the source text contains errors. Use the Qualidator SiteAnalyzer to find the errors on your site. Please note that it is not sufficient to validate the homepage only. To optimise access it is necessary that all pages are validated, so that display errors in various browsers can be avoided.
Pop-ups tend to annoy web users, as they appear suddenly and cannot be controlled. In addition, many users associate pop-ups with untrustworthy gambling and porn sites. User-friendly websites should therefore not include pop-ups, with the following exception: a print-preview of a page displayed as a pop-up.
Source:
"Prioritizing Web Usability" by Jakob Nielsen/Hoa Loranger
Further information:
http://www.usability.ch/Alt_nav/Alertbox/NJ_20041206.htm
The tested website is coded to display pop-ups.
Marking previously visited hyperlinks helps users to identify which pages of the website have previously been read. In other words, according to Nielsen the navigation interface should answer three essential questions: "Where am I?", "Where have I been?" and "Where can I go?"
Source and further information:
"Prioritizing Web Usability" by Jakob Nielsen/Hoa Loranger and "Designing Web Usability" by Jakob Nielsen
The tested website does not support fully this type of marking.
Not all visually impaired people make use of technical support to navigate on the internet. The feature to increase fonts is an important element to ensure that all information of the website can be read by all users. Even people who are not visually impaired need to increase the font sometimes. At the same time, an increasing number of older people surf the web; they too need a feature to increase the font. To this purpose, it is important to define the font size not in pixel, but in percentage or "em".
Source and further information:
"Prioritizing Web Usability" by Jakob Nielsen/Hoa Loranger
The font on the tested website cannot be increased and defined with the automated browser feature "Text Size".
The logical connection between definition and form field is missing if the form fields lack an explicit title.
This means that in the instance of a linear form, it is not apparent which definition belongs to which fiels. This is why the element LABEL was introduced with the attribute for, allowing the explicit definition for form fields.
Using the element LABEL allows Screen-Readerusers in particular to view the definition of the form field directly in the form field itself.
Source:
http://www.barrierefreies-webdesign.de/knowhow/formulare/label.html. Further information can be found in the W3C accessibility guidelines (12.4 Associate labels explicitly with their controls, Guideline 12, Accessibility Guidelines for Web Content 1.0, W3C recommendations 5th May 1999http://www.w3c.de/Trans/WAI/webinhalt.html) und http://de.selfhtml.org/html/formulare/strukturieren.htm.
Form fields on the tested website do not contain correct labels.
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A potential warning has been identified.