To show a championship in the web of the center we must accede to Planning → Championships → Championships.
Here we will see the list of championships and we will click the icon 
of the championship that we want to show on the web:
Once we have clicked the edit icon, we will go to the section Additional data of the championship:
As we can see, here we can indicate if the championship is visible on the web, if the details are shown and if the groups that make up the championship are shown. In addition, we can indicate if pre-registrations are allowed by web, if it is allowed to choose a schedule, if it is allowed to choose a team name, if it is allowed to choose a group, if it is allowed to introduce to the users the results of the championship, Dates and if the pre-registration payment is allowed.
Finally, you can also add observations of the championship that will be visible on the web.