Instagram Reels are great when you want to promote some video content, especially if you want to make something which is more permanent (and longer) than an Instagram Story. You should also consider using Reels if you want to boost your follower account and reach people beyond who already follows you. Since Reels can appear on the “Explore” tab, it’s easier to get discovered and draw in an entirely new audience. When it comes to exactly when you should post, there are several competing arguments online - but prevalent advice seems to be morning-midday is the best time to post Reels. Be mindful of where your target audience is located however, and take into account any time differences.