The vector format loads faster and is better when creating any type of design. You can use vector for typography and minimalist graphics. It can be used to create posters or on a brochure. It is versatile; I love to create naturalist portrait style work from my photo-work. It is great for stickers and on business cards; it has a stronger impact on the eye and is much cleaner.
The Noun Project
has free icons; click on my Design