Which file formats do I get the logo in

Vector matters most here, because it scales without losing quality: the same file works on a business card and on a banner across a warehouse wall. A logo that exists only as a JPG blurs the first time anyone prints it larger and has to be redrawn from scratch.

PNG with a transparent background is needed wherever the mark lands on a photo or a coloured surface. A JPG always has a background, so a white rectangle shows up behind the mark, and that is the most common mistake in small company materials.

With the files come colour codes in HEX, RGB, CMYK and Pantone. Without CMYK values the print shop picks the colour its own way, and the company green on a leaflet ends up different from the one on the website.