About Us Page :
Log in to your Shopify admin panel.
Navigate to “Online Store” and select “Themes” from the dropdown menu.
In the “Themes” section, click on the “Customize” button for the theme you want to edit.
The theme customization panel will open, displaying various options and sections.
Locate the section you want to customize and click on it. The available sections are usually listed in the left-hand sidebar.
Select the page from here :
Select Pages > about-us
The theme customization panel for the about us page will open, displaying various options and sections.
Look for this section in the left-handed sidebar :
Go to Text block and then add content on the right hand side. Modify the settings as desired to customize the appearance and behavior of the section.
Once you’re done customizing the sections, click on the “Save” button to apply the changes.
Preview the changes in real-time using the preview window on the right side of the customization panel.