Store name
Enter the name customers and staff should see, then save. The counter under the field shows the allowed length, and Save stays unavailable until the name fits.
Store country
Pick the store's country from the searchable list. The country cannot be cleared, because the storefront uses it as the baseline country for shared-domain URLs: the primary country is served at the root, and other countries use a locale-country path.
When you change the country, the admin offers to update your number format to that country's convention. You can accept the suggested format or keep the current one.
Timezone
The timezone controls the local dates and times shown for orders and scheduled posts, and where reports start and end each day. Changing it does not move anything in time: existing orders and scheduled posts keep their moment and are shown in the new timezone, and reports divide days by the new timezone.