As a graphic designer, one of my frustrations is when someone asks me to incorporate their logo into something (i.e. flyer, website, merchandise, etc.) and the only have the logo in one format. And it's usually not the format you need.
While you can manipulate it to a certain extent, save your designer some frustration by requesting to receive your logo in multiple formats when it's created. Not only will it make the process go faster, you will be able to use your logos in a multitude of ways.
When you have a designer create your logo, make sure they give you the design in the following formats (at least!):
- Vector (.EPS; .AI; .SVG): Vector files are able to scaled to any size without loss of resolution. Not to mention you'll be able to tweak the logo any way you wish, because it will be the original file.
- PNG: PNG files (Portable Network Graphic) are best used on the internet. You're less likely to lose data when using this format. You can also save the logo on a transparent background in a PNG, which also makes it easy to put on a different backgrounds.
- JPEG: Used mostly for high quality printing and digital photography on the web.
- PDF: Easily sent and shared, and it also maintains transparency in the background.
These are the big formats you should always have your logo available. It will make it easier for you in the long run, and save your designer some extra steps.