Previewing, publishing, and sharing documents
Google Web Designer creates several different types of files. It's helpful to understand what each type is for, and what the differences between them are.
Source files (also called "author files") are files that Google Web Designer creates and uses when you're authoring your document. Although the main source file is an HTML file, it's not viewable in the browser.
Don't traffic source files as ads.Instead, publish the document in Google Web Designer, then use the published file. Publishing a document creates streamlined files, adds the appropriate enabler code for AdWords and DoubleClick ads, and lets you configure additional settings for the ad.
Previewing and publishing documents
You can see how your project will appear and function either by previewing the document in Google Web Designer or by publishing it. Previewing and publishing work differently, and are for different purposes.
Previewing lets you see how your work looks at any point while you're creating it. It's a temporary snapshot of your work, generated directly from Google Web Designer, and can't be saved as a separate file.
Publishing creates a publish-ready file. You can view a published file in your browser to see how it will look when it's published. Documents can be published locally as .zip files, published directly to Google Drive, or published directly to DoubleClick Studio.
The best way to share files depends on why you're sharing them. To work collaboratively on a document, you need to share the source files. To share the finished product, you should publish the file locally as a .zip file and either send the .zip file to your reviewers, or place it on a server where they can access it directly.