Confused by why your logo and branding kit has a hundred different file types. You will need a few different file types based on what you are doing. Printing business cards with a local vendor, they may ask for a PDF of your file. Working with another web designer, they may ask for a PNG of your logo for the website.

PNG
(sounds like PING)
has replaced the old man GIF
Raster file type
Has a transparent background
Great for anything digital (need to slap a logo on your Instagram post, PNG is your girl)
Universally used
Can’t be stretch in size
RGB Color

JPG 
Raster file type
Does not have a transparent background, it’s white and will show
Great for digital and web applications 
Who will use it: web designer
Universally used
Can’t be stretch in size
RGB Color

SVG
Vector-based
Transparent
Web designers use it
Great flexibility as a file,
Editable
RGB Color

PDF
Vector (yes like Vector from Despicable Me)
Commonly used for Print
Flexible to change sizes
Editable
Universally used
CMYK Color

EPS
Vector
Transparent
Commonly used for print (Vendors like this one!)
Flexible to change sizes
Editable
CMYK or Pantone Color

AI
Vector 
Transparent
Commonly used for Designers and print vendors
Flexible to change sizes
Editable
CMYK or Pantone Color
HERE’S THE NITTY GRITTY

PRINT
PDF / EPS / AI

WEB
SVG / PNG / JPG

Addition file that may be in your logo kit

ORIGINAL LOGO
A REVERSED VERSION OF YOUR LOGO
BLACK LOGO
WHITE LOGO
SUBMARKS
CMYK VERSIONS
RGB VERSIONS