Use Cases and Deployment Scope
I normally use draw.io to create the architectural diagrams. to-be conceptual diagrams, workflow diagrams, flowcharts, data flows, and entity relationship diagrams—generally, from a business analysis and the project management standpoint, this tool provides the images, logos, and shapes that are required to show the relationships/flows. On top of that, the tool is also quite flexible to embed in the Atlassian Confluence pages to create the documentation for the application as well as structural docs and playbooks, or we can say runbooks, for engineers. You can also import custom images, logos, and PNG files for some applications that are not available in the preset. We also use this under technical aspect for using it as a reference for those teammates who are getting onboarded to our team and having the clear diagrams and figures helps in explaining the working models of processes we follow as a team.
Alternatives Considered
Miro, Microsoft Visio and Whimsical