If connecting to Tor is blocked or dangerous to use from where you are, for example in some countries with heavy censorship, you can use <i>bridges</i> to hide that you are connected to the Tor network.
You can publish a blog or manage an email account entirely from Tails. If you only access it from Tails, it cannot be related to you. You can store documents and images related to this different identity in your Persistent Storage, keep your passwords in <i>KeePassXC</i>, have a dedicated email account in <i>Thunderbird</i>, etc.