💡 What about private guides?
Collections do not change the permissions of the guides that are in them - if your guides are private or restricted to your team, then they won't be visible to the public, even if the collection is shared publicly.
💡 Bonus: Embedding!
In the share menu for the collection, you can also choose to grab the embed code, so you can embed the collection in your own website. Make sure the collection is shared with the public though, otherwise they won't be able to see anything.