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# What is Source Id / Sub Source Id

Traffic is usually incoming from a lot of different sources, whether it's only our direct traffic, or if you've included 3rd party traffic and are now buying traffic from our partners, this guide will help explaining what are the Source Id / Sub Source Id on our platform.

**Source Id **
This segmentation represents a traffic source from a higher level hierarchy point of view, either one of Ad-Maven's direct sources, or a 3rd party traffic partner source.

For __Direct traffic__ - a Source Id is standalone, meaning it is the only one in the hierarchy.
For __3rd party traffic__ - a Source Id will be representing a partner's main source and it's type (for example Pop + Mainstream), Under that hierarchy there is Sub Source Id.

**Sub Source Id**
This segmentation represents a specific traffic source from a lower level and micro management point of view, it comes in the format of SourceId_SubSourceId.

For __Direct traffic__ - Since direct Source Id is standalone, it has no hierarchy beneath it, and will appear like the Source Id with "_-1" on the SubSourceId parameter - SourceId_-1,
For example : 

SourceId 123456
↓
Subsource Id 123456_-1

For __3rd party traffic__ - Sub Source Id will represent all the sub sources (or what you may know as subid/zone) that are under a Source Id,
For example : 

SourceId 85712
↓
SubsourceId 85712_59193

![An example for SourceId and SubSourceId hierarchy](https://storage.crisp.chat/users/helpdesk/website/f352dd782f6b280/sourcesubsourceexampledrawio_l6j38v.png)