Setting default filters on the dashboard guarantees that anybody visiting the page for the first time will have the same filters applied.
Start by checking the filter options to be set as the default options.
Once the desired options are checked, click "Set As Default" and the specified options will be set at the default filter view.
When multiple filters are applied, there is an easy way to return to default settings. Start by opening up the filter tab again.
Next, click "Reset Filters", and they should revert to the default options. Finally, click "Apply", and the default filter options will again take effect.