This website is using a robots.txt file.

This website has a sitemap file.

Your webpage has 15 'img' tags and 10 of them are missing the required 'alt' attribute.

Congratulations! Your page does not use HTML deprecated tags.

Congratulations! Your website is using the correct version of Google Analytics tracking code.

Congratulations! There are no severe JavaScript errors on your web page.

Congratulations! Your HTML size is 13.60 Kb and this is under the average web page size of 33 Kb.
This leads to a faster page loading time than average.

Congratulations! Your page is successfully compressed using gzip compression on your code.
Your HTML is compressed from 59.05 Kb to 13.60 Kb (77 % size savings). This helps ensure a faster loading web page and improved user experience.

Your site loading time is around 4.913 seconds and this is under the average loading speed which is 5 seconds.

Your page has more than 20 http requests, which can slow down page loading. You can try reducing http requests through various methods such as using text instead of images, using css sprites, using data URIs instead of images, or combining several external files together into one.

Your site is not using expires headers for all of your images. An expires tag can help speed up the serving of your webpages for users that regularly visit your site and see the same images. Learn more about how to add expires headers to your images.

http://kdv4.de and http://www.kdv4.de/ resolve to the same URL.

Congratulations! Your webpage does not include email addresses in plaintext.

Congratulations, your website uses media query technique, which is the base for responsive design functionalities.

Your webpage doesn't take the advantages of HTML Microdata specifications in order to markup structured data. View Google's guide for getting started with microdata.

Your webpage does not use the noindex meta tag. This means that your webpage will be read and indexed by search engines.

Your webpage is using the canonical link tag. This means that your webpage is not the preferred one to use in the search results.

Your webpage is using the nofollow meta tag. You are advised to use this tag carefully since search engines will not crawl all links from your webpage.

Your robots.txt file disallow the search engines access to some parts of your website. You are advised to check carefully if the access to these resources or pages must be blocked.

Your DNS server is not using an SPF record. SPF (Sender Policy Framework) allows administrators to specify which hosts are allowed to send mail from a given domain by creating a specific SPF record or TXT record in the Domain Name System (DNS). You can find more information about SPF records here.