The information that you fill up here will be displayed at the contact page.
The form here is self explaining so no need for more, maybe except the Map field.
The best is to copy the coordinations from a map, than paste the data to the Map field.
You just right click at the location at the google maps and that copy the coordination number
At the mapy.cz, you right click at location select Add own POIs, that the coordination are ready for you to copy at the very right side of your screen
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If you wish to add links to Social networks, that can be found under the button