Here's what it could be:
* A misspelling of "sale": This is the most likely scenario, especially if you saw it in a commercial or marketing context.
* A word from another language: If you saw it in a different context, it could be a word from a different language. For example, "salen" is a Swedish word meaning "they sell".
* An acronym: It could be an acronym for a specific phrase. For example, "SALEN" could stand for "South African Labor and Employment Network".
To understand what "salen" means, you need more context:
* Where did you see or hear it?
* What was the surrounding text or conversation?
Please provide more context so I can help you understand the meaning of "salen."