One of the most common uses for this command is actually with your E axis (the filament position). You can quickly override the current filament position so that all future commands will now be relative to this new value. It is common to do this at the start of each layer or right before a prime or retraction command.

What is an e axis?

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What are the 3 axis in 3D printing?

Cartesian 3D printers are the most common FDM 3D printer found on the market. Based on the Cartesian coordinate system in mathematics, this technology uses three-axis: X, Y, and Z to determine the correct positions and direction of the print head.