A TIFF, or Tagged Image File Format, is a widely supported file format that works in just about any program. A TIFF is of higher quality than JPG or GIF, but not vector-formatted like an EPS. Typically when sending TIFFs to clients I try to create them at a larger size, so if needed they can resize down or stay with the larger size for more versatility. In certain cases, these can also be used for higher quality prints, granted they were created at 300 dpi and don’t need to be resized larger than delivered.
What it is suitable for:
Microsoft Office programs
Standard printing for common use (i.e. invoices, letterheads, etc.)