When designing with a DAC, you expect the output to move from one value to the next monotonically, but real circuits don't always behave that way. It's not uncommon to see overshooting or undershooting, quantified as glitch impulse, across certain code ranges. The DAC Glitch Impulse of MAX5113 is defined in page 4 of datasheet.
1) the specification defined in page 4 is the glitch impulse @ Major-Carry Transition. A major-carry transition is a single-code transition that causes a most significant bit (MSB) to change because of the lower bits (LSBs) transitioning. Binary code transitions of 0111 to 1000 or 1000 to 0111 are examples of a major-carry transition. Normally, the size of the glitch is defined by the size of the transition and where in the overall range the transition occurs. In general, a small transition results in a small glitch. So typically the glitch size in your application will be much smaller than the value in datasheet.
2) MAX5113 have a track/hold function will further improve the performance, please see more details of track/hold operation in the datasheet.