Blog comments let shoppers respond to your posts. You control them from Blog → Settings with two options: who may comment, and whether new comments wait for your approval.
Who can comment
Everyone lets both guests and logged-in customers comment (guests enter a name and email). Registered customers only asks shoppers to sign in first. Disabled turns comments off entirely.
Moderation
With moderation on, new comments are held as pending and only appear on your storefront after you approve them from the blog comments list. With moderation off, comments appear immediately and you can still hide or delete them later.
What Disabled does
Disabled switches the whole comments surface off: shoppers can no longer submit, existing comments stop showing anywhere on your storefront, and comment counts show zero. Nothing is deleted — your comments are kept exactly as they are, and turning comments back on restores all of them immediately.