How the 4 seconds at the start of your video propagate through every number in your business - and what they’re costing you when they’re broken.
This is a worked example with three equations. You can plug in your own numbers as you go. By the end you’ll have a quantified picture of what your hook is actually worth.
If you’ve never run the math on your content, this is the most uncomfortable 15 minutes you’ll spend this month.
You’ll need three things:
If you don’t have those, bookmark this and come back when you do. The math doesn’t work on guesses pulled from the air.
Most creators don’t know this number. Instagram doesn’t put it on the front of the analytics - you have to drag your finger across the retention graph to see it.
Here’s how:
Open one of your reels from at least 48 hours ago. Tap Insights. Scroll to the Retention graph. Hold your finger on the graph and drag it to the 4-second mark. The number shown is the percentage of viewers still watching at that point.
Two important things to know before you read your numbers:
Don’t read retention earlier than 48 hours after posting. Within the first few hours, your warm followers (who watch more) are over-represented in the audience, which artificially inflates the retention number. It’s like weighing yourself in the evening - the number’s higher than your true baseline because the day’s added weight. Wait 48 hours and the cold viewers have washed through.
Use the 4-second mark specifically, not the average retention number Instagram shows by default. Average retention is misleading because it averages across the whole video. The 4-second drop-off is where you find out whether your hook is doing its job.
Do this for your last 10 posted reels. Write each number down. Average them.
That number - your average 4-second retention - is your current hook efficiency. Hold it. We’re about to do things to it.