Raster images or graphics are composed of pixels. A raster image can be scaled down while avoiding pixelization but cannot be scaled up to be larger than its maximum size. A JPG is a common raster image file type.
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A png or portable network graphic is similar to a jpg or gif, except it has the ability to maintain transparency. Logos are commonly saved as pngs.
A PSD is a native (editable) photoshop document. A photoshop document saves your layers and adjustments for you to change later.
A PDF, or portable document format, is the best file format for sending your art files for print. PDFs are an electronic image of text and graphics that can be saved using various specifications, such as bleeds or color profiles, making them useful for printing.
RAM, or Random Access Memory, is the physical hardware within a computer that temporarily stores data. This data is referred to as “working data.”
Lossless is a type of compression that maintains all data from the original file.
A JPG, or joint photographic experts group, is a commonly used method for lossy compression of digital images.
A GIF, or graphics interchange format, is a lossless image format that supports both static and moving images.
EXIF, or exchangeable image format, is the descriptive data, or metadata, in an image file that details the resolution, date taken, etc.