Blocking a person is a drastic action to avoid a person on Instagram. If you block someone on Instagram, they won’t be able to see your profile, uploaded posts, and stories. In short, you prohibit them to communicate with you in any way. You also can’t send them messages or leave comments on their post. Moreover, they’ll understand that you’ve blocked them. On the other hand, restricting someone is a less complicated way to avoid unwanted people, comments, and messages on Instagram. When you restrict a user, they won’t get any notification about that and will still be able to view and comment on your post. But the comments will be visible only to you and the user. They can send you messages as well that you’ll find in message requests.