well I am still discovering Jira+Confluence ecosystem. Surprisingly, our project is a cloud development, and we chose Jira & Confluence server distributions ... hosted on the cloud!
@Damien_de_Paysac Welcome to the Atlassian Community, Damien! Be sure to poke around the product collections that interest you, as well as off-topic threads like Friday Fun. 🎉
I liked the cloud version better, had a more cool features, as did Confluence.
They are great tools as you can easily link tickets in Confluence pages and they auto-update. This allows non-JIRA users ability to view Confluence pages and ticket status.