This module is called News. You can manage it in the Content / News section. You can edit or create a new update according to the instructions.
The news is sorted chronologically according to the date of creation. You can additionally change this date in the detail of a specific news item in the Advanced section.
You can view a separate page with a list of all news at the address www.vase-domena.cz/news. This is a special type of category "News link" (tutorial).