Your journal is private by default — only you can see it.
However, if you plant today’s tree and choose to use the Birdy feature, you can share your thoughts anonymously. In this case, a short and anonymous version of your entry is shared with users in other forests, and you may receive replies in return.

Rest assured: your entry will never be shared with others unless you choose to send it through the birdy. You’ll always see how it will be shared before sending.