Everything you need to mention Vehicle Imagery: the wordmark for light and dark backgrounds, the colours, the typeface and the few rules that keep it all looking right.
The wordmark is the primary logo; the mark carries small spaces such as app icons and avatars. SVG scales to any size and is the right choice almost everywhere; the PNGs are large and transparent.
For places outside a design tool, an email signature above all: these addresses never change, so a logo pasted into a template today still resolves in a year. Link them directly, no download needed.
dark is the ink version, for light backgrounds. white is for dark ones.
full is the wordmark, symbol the mark on its own.
PNG comes at the width a logo actually sits at in an email, 400px for the wordmark and 256px for the mark. Append @2x before the extension for twice that on high density screens.
Every PNG has a transparent background. In an email that means the dark version disappears on a dark template, so pick the one that matches where it goes.
In an email, use the PNG. Most clients, Gmail and Outlook among them, refuse to render an SVG in a message body, so the logo arrives as an empty box. SVG is for the web and for print artwork.
Give the image an explicit width and height in the markup. Outlook ignores CSS sizing on images and will otherwise show it at full size.
