When creating a pitch deck for angel investors, you can increase your chances of a successful outcome by: formulating your UVP clearly, providing your audience with the correct information (including data such as sales and revenue) to show that you understand your market, use storytelling to involve your audience emotionally, create urgency (instilling FOMO - Fear Of Missing Out) in your audience, and keep your branding consistent throughout the pitch deck.
Ideally, you should send the pitch deck to potential investors in a PDF format at least a week before the meeting.