Snapchat works the same way as Facebook and Twitter - You'll need to select the objective first, design your Audience after, then create a Creative and finish up with your settings! 

So we'll go through each of these steps to make sure everything is clear!

Selecting the "Traffic" objective for your campaign means that your aim is to drive people to your specific parts of your website. 

Selecting the "Conversions" objective for your campaign means that your aim is to get people to take valuable actions on your website, such as adding payment info or making a purchase. 

Selecting the "Mobile App Install" objective for your campaign means that your aim is to get people to Install your app on their mobile devices. 

Selecting the "Mobile App Engagement" objective for your campaign means that your aim is to get people to use your app more often, or start using it again. It's a vital objective for you to build customer loyalty and lifetime value. 

Selecting the "Brand Awareness" objective for your campaign means that your aim is to show your ad to as many people that have a high chance of being interested as possible.

Selecting the "Engagement" objective for your campaign means that your aim is to get as many people interacting with your post or story.

Selecting the "Performance - Video Views" objective for your campaign means that your aim is to get as many views on your video as possible.

Selecting the "Performance - Lead Ads" objective for your campaign means that your aim is to get as many leads as possible. It will take you to a specific type of Campaign that you can discover here! 

Selecting the "Performance - Catalog Sales" objective for your campaign means that your aim is to promote a selection of products all at the same time.

Next step is to create an Audience!