The 1500 kilogram Hope (or “al-Amal” in Arabic) probe will study the Martian atmosphere for as much as four years "in hopes of finding answers to ongoing conundrums involving Mars’ long term water loss via atmospheric photo-dissociation."
An article in Forbes quotes Bruce Jakosky, NASA MAVEN (Mars Atmosphere and Volatile Evolution) mission Principal Investigator and a Hope mission Co-Investigator.:
“The UAE Space Agency has been very consistent in that they don’t want to do a technology demonstration mission. They want to contribute substantively to the world’s exploration and understanding of Mars.”