Start by adding text to your scene:
Go over to the Inspector - you'll see an option for Dynamic Text, under Typography:
Click Insert next to Dynamic Text.
You'll see a list of options. For example, Current City, Current Airport and Day of the Week:
Each of these options represents a different type of personalized text that can be added to your effect. Choose the options you want. The text will be added to your scene.
When you're building an effect with dynamic text in Spark AR Studio, you'll see default values for the text you've added. For example, the Current City will always show as London. This is because Spark AR Studio doesn't have access to that data through your computer.