For some reason, customers often forget about this and believe that it is enough to simply create an online store. Maintaining an online store is a very important task. Alas, this is not the case after launching an online store, you will need:
Create regular backups (to feel on the safe side and, in case of emergency, restore the most recent backup). Usually we (or your hosters) store 7 backups for last 7 days, 4 backups for last 4 weeks and 12 backups for last year. This best scheme will allow you to be secure while making optimal use of your server's disk space.
Update both the online store itself and installed plugins / extensions (progress does not stand still and developers regularly release updates to their plugins and platforms. These updates often contain both improved functionality and fixes for vulnerabilities found, which makes your online store more secure).
During the life of an online store, customers often need to perform various kinds of improvements (starting from minor design changes and ending with major functional improvements, such as integration with the services of new partners, etc.)
You may also need emergency assistance in case of an attack on your online store, or unauthorized access to it by unauthorized persons. To prevent it, you need to regularly update the environment on the server (which often has a positive effect on the speed of its work).