Commercial use is an important term to check before you use audio material such as background music or sound effects in work you publish. Being able to download material is not the same as being allowed to use it the way you want. In the end, check the terms of use given by the source that distributes the material.
What it basically means
Commercial use is a term for thinking about who may use a work and under what conditions. Do not judge by the label alone; check the conditions covering which material, which users, which uses, which regions, and which periods are included.
Items to check
Check whether commercial use is allowed, whether credit is required, and the rules on modification, redistribution, selling the material on its own, and the media it may appear in. The conditions can also differ for video, streaming, advertising, and games.
Keep a record
Keep the material name, the source, the date you obtained it, the URL of the terms, and any required credit together with the project. That makes things easy to verify when you later add more places to publish, or when someone asks.
Common misunderstandings
Free distribution, royalty-free, and waiving copyright do not mean the same thing. And even when no credit is required, that does not mean there are no other conditions.
When you are stuck
If the terms are unclear or you cannot judge whether your use is covered, ask the distributor or refrain from using it. This article is general information and does not represent legal advice for any specific case.
The basics of checking
Re-check the terms for each work before you publish. The basics of audio material are explained in the article on audio file formats.
