The series is considered to be Broad Strokes canon to the main timeline.
The series is a Prequel to the events of the video games, despite the appearance of numerous characters who would not canonically show up until centuries later. The series revolved around the winner of the previous Mortal Kombat, Kung Lao and his allies Siro and Taja versus various individuals who threaten Earthrealm.
Mortal Kombat: Conquest was a short-lived live-action TV series based on the highly successful Mortal Kombat video games, airing from 1998 to 1999 first in syndication and then on TNT.