When setting up a site it is good practice to start with editing the Site settings to adding in information about the site and Close the site as a site is open by default after installation or addition.
This is also where you can add in your preferred robots rules.
General information about the site
The fields can be reached with liquid to add information for the website. Usually the themes will include the information from the site object added in this admin view.
<title>
{{ site.title }}
</title>
Cover image
By uploading a cover image, this can be used when needing a link for external usage. If the cover image is changed in the site settings page, it is also updated in all places the links are used. The uploaded image will rescale to smaller sizes but the original file should be at least 1200 px wide and maximum 3-4 Mb large.
The cover image can and is used in the templates for the Open Graph Tags for social media.
Open and close the site
The site is open per default when created.
In the closed state the site will use the layout template named restricted.liquid, but as an admin user you can still access all the other views, while logged into the admin.
Robots.txt
The content in Robots will be placed in the /robots.txt file