Many interactive websites and online forums allow users to preview their content before submitting it. This is particularly useful on sites with complex markup (not WYSIWYG), where it serves as an opportunity to identify and correct errors and formatting problems before saving the content.
A preview is also known (for a film) as a trailer.
Are Previews Out-Frocking Fashion Weeks?: Many Designers Are Choosing to Ditch Fashion Weeks for Previews. after Hrs Explores This Trend
May 28, 2013; "A grand fashion week or personalised showcase of their designs? This seems to be the debate of the day for Indian designers with...