What's the meaning of "memo"?

This might sound silly, but when applying for a dungeon/raid group, most player say memo. What's the meaning of that?

Memorial. It normaly means meet at Dalaran memorial so the raid leader can inspect your gear. (the memorial is to the left of the horde bank )

Antonidas Memorial
https://gamepedia.cursecdn.com/wowpe...ad36540a73855d

The Antonidas Memorial is located between the Magus Commerce Exchange and Sunreaver's Sanctuary in Dalaran. It is a monument to the late archmage Antonidas, the previous leader of the Kirin Tor, who was killed by Arthas Menethil shortly before the fall of Dalaran.

The statue was designed by Antonidas' student Jaina Proudmoore, who also covered the costs and selected the artist. The statue hovers about six feet above the grass thanks to a spell and depicts Antonidas holding a constantly-turning orb sparkling with magic in one hand and his greatstaff, Archus, in the other. The statue is accompanied by a plaque with an inscription from Jaina.

Ohh jeez, I would never reach it :P

Thanks a lot comlogo and OhieMitzen.