This is a CA certificate. If you tell your web browser to trust it, then it will recognize as valid any SSL certificate I create. For example, I could create a certificate for mail.google.com and then use some trick such as DNS cache poisoning to make all requests from your browser to mail.google.com go through my server. From your point of view, nothing would look out of the ordinary. Behind the scenes, I would be reading your email. Only tell your browser to trust this certificate if you trust me not to do things like that!
TL;DR: If your name is not Alexander Wauck, you probably shouldn't trust this CA certificate.