How your brand flows in
Set your colors and fonts once, and every template and ad picks them up.
You set your brand up once, and it flows into everything you make. A layout takes on your colors, fonts, and logo, and an ad made from that layout keeps them. Change your brand later and your templates follow along. We call this the cascade.
Your brand (colors, fonts, logos)
↓
A template (a layout that takes on your brand)
↓
An ad (your words and pictures in that layout)Editing one thing won't break another
When you turn a starting layout into one of your templates, it becomes its own thing. Tweaking that template won't change your other templates, and editing an ad won't change the template it came from. So you can adjust anything freely, knowing it stays put and nothing else shifts underneath you.
Colors and fonts stay live
You never lock a color or a font onto a piece of text. The text just knows it's a heading, or body, or a button, and your brand decides what each of those looks like. So if you change your accent color in one place, everything that uses it updates at once. No need to redo a single template.
This is also why an AI can rewrite the words in a creative and have it stay on brand: it's changing the text, not the look. The look comes from your brand.
If you build your own templates, there's a bit more to it (which styles to set where), covered in System templates.