Welcome to the Merecat web server. This is the default landing page for new installations. Seeing this means the web server is working and the owner has not set up any pages of their own yet.
The limited feature set makes it very quick. Virtual hosts, native HTTPS support, CGI, PHP, and URL-traffic-based throttling are just about its only features. The resulting footprint (~140 kiB) makes Merecat very suitable for small and embedded systems.
See the manual pages for more information: