This guide assumes you've already installed the Milanote iPhone app. If you haven't, you can download it from the App Store.
To start saving links, you need to enable the Milanote share extension in Safari. Here's how to do that.
Step 1: Tap on the share icon in the bottom toolbar in Safari
Step 2: Scroll across to the right and tap on the "More" button
Step 3: Turn on the Milanote extension by flipping the switch next to it
Step 4: Choose the Milanote extension from this list