To block someone on Instagram, go to the person's profile, tap the three dots menu (usually at the top right corner), and select "Block." The person will not be notified that they were blocked, and they will no longer be able to see your profile, posts, or send you messages. You can unblock them anytime from your blocked list if you choose to do so later.

How to Block on Mobile (iOS/Android)

• Open Instagram and go to the profile of the user you want to block.
• Tap the three dots menu in the top right corner of their profile.
• Select "Block" from the options.
• Confirm your choice to block the person.

How to Block on Desktop

• Visit Instagram.com and go to the profile or your messages with the user.
• Click the three dots in the upper right area of their profile or chat sidebar.
• Click "Block" and confirm.

Additional Info

• Blocking someone stops them from interacting with you on Instagram.
• They won't receive a notification that they were blocked.
• You can block from the chat or directly from the user's profile.
• To block more than one person, you can use the blocked list in your settings to add additional accounts.

This is a straightforward way to protect your privacy or prevent unwanted interactions on Instagram.