Completion rate tells you more than plays
One number that is worth more than everything else on your analytics page.
If you look at one number, look at completion. Almost everything else is downstream of it.
What it is
The percentage of people who started your track or video and reached the end.
Plays tell you how many people arrived, which is mostly a function of distribution. Completion tells you what happened when they got there, which is a function of the work.
Why it matters more
Every recommendation system on every platform weights completion heavily, because it is the hardest signal to fake. A play can be bought. A follow can be bought. Thousands of people voluntarily reaching the end of something cannot be, at any price that makes sense.
So completion is both the honest measure of whether the work connects and the thing that determines whether you get shown to more people. Those being the same number is not a coincidence.
Reading the drop-off
Falling in the first ten seconds is an opening problem, or a mismatch between what the listener expected and what they got. Check what is bringing them — if the clip that drove them there is not representative, this is what that looks like.
Falling around a third of the way usually means the second section does not deliver on the first.
Falling near the end matters least. People who got that far liked it.
High completion with low plays is the best problem to have. The work is fine; go and find more people.
The trap
Do not optimise by making everything shorter. A two-minute song has an easier time being finished than a five-minute one, and if you cut everything to two minutes you will improve the metric without improving anything real.
Completion is a diagnostic, not a target. The moment you aim at it directly it stops telling you the truth.