Bohdan Danyliuk
enruuk
Lessons2/33

Lesson 2 of 33 · 30 minutes

What the platforms actually measure

Understand, from the platforms' own statements, which signals decide whether people see your video, and turn that into a few simple design rules for your reels.

Goal

Understand, from the platforms’ own statements, which signals decide whether people see your video, and turn that into a few simple design rules for your reels.

The core idea

Short-video platforms are recommendation systems. They do not mostly show your video to your followers; they test it on a small group of people and expand or stop based on how that group behaves. You do not need to understand the algorithms in detail. You need to understand the behaviors they reward: people stay, people finish, people react.

What the platforms say

These statements come from the platforms themselves. They describe signals, not exact formulas, and platforms change their systems, so treat them as direction, not law.

TikTok (How TikTok recommends videos):

  • Recommendations use signals in three groups: how viewers interact with content (likes, shares, follows, comments, content they create), information about the video (captions, sounds, hashtags), and device and account settings (language, country, device type).
  • Strong signals of interest get more weight than weak ones. TikTok’s example of a strong signal is watching a longer video from beginning to end. Device and account settings have lower weight.
  • TikTok states that neither follower count nor the success of an account’s previous videos is a direct factor. In practice that means a new account can reach people if a video holds attention.

Instagram (Instagram ranking explained):

  • Feed, Stories, Explore and Reels use separate systems.
  • For Reels, the system predicts how likely a person is to watch to the end, like, share, or go to the audio page. Instagram also asks users whether a reel was worth their time.
  • Instagram lists things that reduce Reels reach: low resolution, a visible watermark from another app, no sound, borders, mostly text, and content that was already posted on Instagram.

Notice what is on both lists: finishing the video, sharing, and technical cleanliness. None of them are “gaming” techniques. They describe content that people stay with.

Translating this into rules

Turn those statements into design rules for yourself:

  1. Completion is the goal. A 20-second reel that 70 percent of people finish is usually a better signal than a 60-second reel that 15 percent finish. Cut anything that does not earn its seconds.
  2. The first seconds decide who stays. You will study hooks in lesson 3.4. For now: a viewer decides almost immediately, so your first line and first frame carry the video.
  3. Make sharing a natural thing to do. People share videos that say something they want to say, help someone they know, or make them laugh or feel seen. Ask: who would I send this to?
  4. Keep the file clean. Export in vertical, in good resolution, with sound, with no other app’s watermark.
  5. Original beats reposted. Do not re-upload the same clip you posted elsewhere with a visible watermark.
  6. You do not need followers to start. Per TikTok’s own statement, followers are not a direct factor. Your first reels can reach people.

A word about “viral”

“Viral” is the outcome of many small things going right: a clear idea, a strong start, a satisfying end, being shown to the right people. You cannot control the last part. You can control the first three. Aim to make reels that are good at retaining the people who see them, and the reach takes care of itself over time. Chasing a one-off viral hit is a way to burn out.

Example: reading a reel through these signals

Take a 25-second reel: “Three mistakes I made when I switched careers.”

  • Hook: “I changed careers and these three mistakes cost me a year.” (stays)
  • Structure: mistake 1, mistake 2, mistake 3, each about 5 seconds. (finishes)
  • Ending: the third mistake ties back to the hook. (rewatch)
  • Share: someone thinking of switching careers is the obvious person to send it to. (shares)

You can score any idea by those four lines before you film it.

Common mistakes

  • Optimizing for likes. Likes are a weak signal compared to finishing and sharing.
  • Making the video long “to give value”. Value density matters more than length.
  • Ignoring audio. No sound is on Instagram’s own list of things that reduce reach.
  • Believing hashtag tricks replace a good video. Hashtags describe a topic. They do not create attention.

Exercise

Open your own feed (Reels or For You) and watch 15 videos. For each, write one line: did I finish it? why? Do not analyze the topic, only your behavior. At the end, circle the common reasons. This is your personal retention model, and you will reuse it in lesson 3.2.

Daily practice

  • Minimum (keeps the streak): a voice note of any length.
  • Today’s take (about 30 seconds): Tell the lens, in 30 seconds, about one video you finished today and why you finished it.
  • Weeks 1-2 everything stays private; from week 3 follow your publishing plan.
  • Don’t watch the take right away (lesson 4.1). Tick the day in your tracker.

Reading (optional)

This week’s book, about 15-20 minutes: Austin Kleon, Steal Like an Artist. A loose suggestion; it does not have to match the lesson. More in resources and the schedule.

Checklist

  • I can name the three behaviors platforms reward: stay, finish, react.
  • I know that completion and shares matter more than likes.
  • I know my exports must be vertical, clean and have sound.
  • I wrote down why I finished or abandoned 15 videos.
  • I recorded today’s voice note and take.

Sources

← 0.1: How this course works | Course index | 1.2: Anatomy of a reel →