Customers build some associations with your brand right after they land at your store for the first time. This is why it is important to configure the default page (the one associated with the store's base URL) since this is where people land if some page is not accessible.
Thus, having these default pages configured helps to guide your clients through the website and eliminates any confusion that might appear on the way.
This article is exactly what you need if you want to know how to set up default pages in Magento 2.
To configure default pages in Magento 2:
1. Go to Stores > Configuration > General > Web > Default Pages and enter the Default Web URL.
2. Choose what page should be displayed for the CMS Home Page.
3. Specify the Default No-route URL.
4. Select the CMS No Route Page from the available options in the dropdown list.
5. Choose the CMS No Cookie Page to be displayed when cookies are disabled.
6. Specify whether to Show Breadcrumbs for CMS Pages.
Don't forget to press the Save Config button and that's actually it.
This configuration doesn't take much time, does it?