A logo URL points to an image used for a channel, programme, app or other catalogue item. A player may fetch that image separately from the playlist and media. A missing logo can therefore be an image-path, format or caching issue even when the corresponding channel continues to play normally.
A practical example
A channel's name and picture can remain in a list while its logo disappears after the image host changes an address. Updating the image reference or refreshing an image cache addresses a different problem from changing the actual stream.
A common misunderstanding
A familiar logo does not verify channel identity, programme rights or affiliation. Also avoid putting account tokens into image URLs that may be stored in logs or shared screenshots.
Related terms
Stable technical definition. Editorial approach