When you find a good source, it's important to share what you've found without plagiarising or violating the source's copyright.
Paraphrasing your sources without plagiarizing them takes some practice. It can be easy to unconsciously mimic the structure and word choice of the original source.
Copying words, structure, or phrases from the original source — even when cited to that source — violates Wikipedia’s copyright policies and is a form of plagiarism.
The best way to avoid this is to find information from a variety of good sources, make sure you really understand the information, and then write it using your own words.