Open source software is freely licensed, so you can use, copy, study, and change it, and the source code is openly shared so that people can use it and improve it. However, licenses define what users are allowed to do with the software components, their obligations, and what they cannot do in line with T&Cs. It’s expected that others will use, change, and share open source software, but nevertheless, the legal default remains exclusive copyright, so users are advised to get a license that explicitly states the permissions and conditions. It’s important to be aware that within some software there may be dependencies that have their own licenses. It’s therefore important to check the licenses for each component and dependency to ensure compliance.