Crowdsourcing refers to a collaborative effort to find content through a specific community. For example, crowdsourcing is done for projects. This entails looking for ideas. You have already heard of crowdfunding, which involves finding funding for certain projects.
Crowdsourcing is not necessarily specific to the translation industry, but it has been seen in the industry to be included in their workflow.
First, we send a document to a community of language experts. Professional translators then do post-editing as part of their work flow. It's a way to look for help with terminology, translation, or another area requiring expertise. It's collaborative.