You shared one campaign link in an Instagram Story, a YouTube description and a Telegram post. You got conversions. But which placement drove them? Without sub IDs, you are guessing.
What a sub ID is
A sub ID is an extra label attached to your tracking link. The tracking system records it with each click and passes it through to conversions. Reports can then group results by that label.
Example:
- Story link:
…?sub1=ig-story - YouTube link:
…?sub1=yt-review - Telegram link:
…?sub1=tg-deals
All three are the same campaign link and credit you the same way. Only the label differs.
Naming conventions that stay readable
Pick a simple pattern and stick to it:
| Pattern | Example | Good for |
|---|---|---|
| channel | instagram |
First comparison between channels |
| channel-format | ig-reel, ig-story |
Comparing formats |
| channel-date | tg-0715 |
Daily deal posts |
| channel-topic | yt-budget-phones |
Content topics |
Tips:
- Use lowercase letters, numbers and hyphens.
- Keep labels short.
- Keep a simple sheet listing what each label means.
- Never include personal information such as names, phone numbers or emails.
Reading sub ID reports
On M2E, the Statistics page has a By sub ID table showing clicks, conversions, conversion rate, revenue and pending revenue for each label in the date range you choose. Look for:
- High clicks, low conversions: the placement attracts curiosity but not buyers. Change the message or the audience.
- Low clicks, high conversion rate: a small but well-matched audience. Give it more attention.
- High rejected share: the traffic may not meet the campaign’s eligibility. Check what you promised.
Example: deciding where to post
Say over two weeks your sub IDs show:
| Sub ID | Clicks | Conversions |
|---|---|---|
| ig-story | 400 | 6 |
| yt-review | 120 | 9 |
| tg-deals | 900 | 8 |
The Telegram channel brings the most clicks, but the YouTube review converts far better per click. That suggests investing more in reviews, and testing a better pre-qualifying message on Telegram. (These numbers are illustrations, not benchmarks.)
Sub IDs are not a reason to over-split
If you label every single post, each label gets so little data that you cannot learn anything. Start broad (one label per channel), learn, then go narrower where it matters.
Key takeaway
Sub IDs turn “I made some sales” into “this format on this channel works”. Add one to every link you share, keep the names simple, and check your sub ID report every week. For more, see using statistics to grow your affiliate earnings.
Frequently asked questions
How do I add a sub ID on M2E?
Add ?sub1=your-label to the end of your campaign link, for example ?sub1=telegram. Your statistics then show results by sub ID.
Can I put personal data in a sub ID?
No. Never put names, phone numbers, emails or other personal information in a sub ID. Use short neutral labels.
How many sub IDs should I use?
Enough to answer your questions, and no more. Start with one label per channel, then add per-post labels for your most important placements.
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