# Primary Catalogue
### What is the Channel Catalog?
The Channel Catalog is a Telemetr.io tool used to find Telegram channels for advertising placements and evaluate their advertising potential.
It helps users:
* identify channels suitable for ads;
* compare channels using key performance metrics;
* make informed decisions before launching advertising campaigns.
The Channel Catalog is not an ad marketplace.\
It is an analytics tool designed to support decision-making.
### Who is the Channel Catalog for?
#### For advertisers and agencies
* Selecting channels for ad placements.
* Comparing channels by engagement, growth, reach, and Ads Index.
* Identifying channels worth testing.
* Reducing the risk of ineffective advertising.
#### For channel owners and administrators
* Evaluating their channel compared to the market.
* Understanding how their channel looks from an advertiser’s perspective.
* Analyzing growth and engagement dynamics.
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### Page Structure
#### Promo Block (Top of the Page)
The top section may display different promo banners with Telemetr.io research or reports or new updates\
\
This block is dynamic and may change over time.
* It does not affect channel rankings or analytics data.
#### Channel Table
Each row in the table represents one Telegram channel.
### Channel Metrics Explained
#### Channel Name
The channel name and @username.\
Clicking opens the detailed channel analytics page.
#### Subscribers
The current number of channel subscribers.
Why it matters:\
Helps assess the channel’s scale.
#### Ads Index
Ads Index shows how profitable it is to buy ads in this channel.
* This is a Telemetr.io internal metric.
* It is used only to compare channels with each other.
* The calculation formula is internal and may change over time.
Why it matters:\
Allows quick identification of channels with stronger advertising potential.
#### Growth (24h / 30d)
Subscriber change:
* over the last 24 hours;
* over the last 30 days.
Why it matters:\
Shows whether a channel is growing, stable, or losing audience.
#### Growth Chart (90d)
A chart showing subscriber dynamics over the last 90 days.
Why it matters:\
Helps identify long-term trends rather than short-term fluctuations.
#### Views
Average number of post views.
Why it matters:\
Estimates the real reach of advertising placements.
#### ER (Engagement Rate)
Audience engagement level.
Why it matters:\
Shows how active and responsive the audience is.
#### Category
The channel’s topic or niche.
Why it matters:\
Allows filtering channels by industry or content type.
### Filtering Channels
#### Quick Filters
* Category
* Number of subscribers
* ER
* Ads Index
* Cheaters
* Advertised on TG Ads
Why it matters:\
Enables fast initial screening of channels.
#### Advanced Filter
The advanced filter allows more precise selection using:
* Post Views (24h)
* Channel type: Public / Private
* Country
* Language
* Channel age
* Audience gender distribution
* Show only:
* Telemetr.io verified channels
* Telegram verified channels
* inactive channels
* blocked channels
Why it matters:\
Supports accurate channel selection for specific advertising goals.
### Sorting
The table can be sorted by any available metric:
* subscribers;
* ER;
* Ads Index;
* growth;
* views.
Why it matters:\
Quickly surfaces:
* the largest channels;
* the most engaged channels;
* channels with positive growth trends.
### Catalog Customization
The Customization feature allows you to:
* choose which columns are displayed;
* change column order;
* hide unnecessary metrics.
Why it matters:\
Lets users adapt the catalog to:
* media planning workflows;
* analytics tasks;
* quick channel screening.
### Important Notes
* The Channel Catalog does not sell ads directly.
* It does not guarantee advertising results.
* All metrics are analytical indicators, not performance promises.
### Recommended Usage Flow
1. Select a category.
2. Apply subscriber and ER filters.
3. Compare Ads Index and Growth metrics.
4. Review the 90-day growth chart.
5. Make an informed advertising decision.
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