RAM (random access memory) acts as a temporary storage location for the data used in printing. It is different from the printer's permanent storage, which is its hard drive. RAM allows faster access to the data required when printing, so that the printer can process and print documents more quickly.

While printing, the printer holds a copy of the print job in RAM and processes the data before sending it to the print head to form the image on paper. Adequate printer RAM helps ensure smooth and fast printing, especially for complex documents with high-resolution images or graphics. If a printer has limited RAM, it may experience delays or pauses during printing, or may even encounter errors when processing complex documents.

Having sufficient printer RAM becomes particularly important when printing large or complex documents, as it allows the printer to store more data and process it efficiently. It can also be beneficial when multiple print jobs are sent to the printer simultaneously, as the printer can prioritize and switch between them without significant slowdown.