Here’s a quick explanation from the Lucidchart’s site:
Project Based Learning: LucidChart can be a useful part of a project throughout the process. First, webs and brain maps can be useful in brainstorming topics as students seek connections between subjects, their questions, and their interests. Second, webs can also be useful in the planning stage, as students identify all the steps required to complete the project – maps can help them visualize the process. Finally, as a project deliverable, flow charts could be used to describe any process – a family tree (or gene pool), economic and trade relationships, or even as a step-by-step guide or decision tree (example: Should you eat that food off the floor?).