In this timeline Germany was unified by Austria rather than Prussia*. Thanks to this Germany proper ended up much larger than it ever was in our timeline, not counting the territory occupied but not annexed by the Nazis. Germany’s relationship with Britain stays cordial and the Empire as a whole is a much more liberal place, with non-Germans eventually getting a great deal of autonomy with Croatia-Slavonia, Hungary and Poland having equal statues within the empire as Bavaria and Prussia. Poland, the Baltic States, and Alsace-Lorraine were captured from France and Russia during the Grand War of 1945-48. Romania gained Bessarabia, Switzerland gained French Savoy and the Franche-Comté while Finland and Ukraine became independent.
The German Empire has two other European positions that have not been integrated into Germany proper, Albania and the Dodecanese islands which are treated as colonies.
In Africa again Germany has more positions that OTL did, the unification Italy was a much more difficult process that ultimately failed, allowing Germany to take over the areas they would have. Libya does not get quite such a romantic name, being simply called North Africa. Germany also annexes Zanzibar rather than swap it’s limited influence their for Heligoland, which remained British.
In Asia Germany aided Thailand and Iran to expel the French and Russians respectively, and in Thailand’s case helped them regain the territories taken from them by the French. The Empire of Vietnam was resurrected and given independence. In both cases Germany gained an ally and a small amount of important territory. Various islands in the Strait of Hormuz, giving them control of the Persian Gulf and it’s oil. In Indochina Germany got a base with which to cut off the French from aiding the Republic of China. As well as their Geopolitical importance these territories are popular tourist destinations.
In China the Guangxu Emperor reforms were much more successful, so that when the Republican revolution came in 1916 the Qing still had support and managed to hold on to Northern China. During the chaos of the revolution and civil war Germany occupied all of Shandong bringing stability and routing bandits. Eventually the Province was annexed and became one of Germany’s most important positions. Germany was not the only one to take advantage of the situation, with Russia annexing Xinjiang and Outer Mongolia and Tibet being coming independent with British aid to act as a buffer between India and Russia.
Germany has no empire in the Americas, but two close allies, Texas and Venezuela. In 1928 the US elected Joseph Whitworth amid fears of an anarchist takeover. Exploiting the public’s fear one by one he stripped away people’s freedom. In 1933 he famously declared “The Americas should be run by Americans” and invaded Mexico. When he ran for a third term, and won in suspicious circumstances, New England, Texas and California seceded. With German, British, Spanish, Brazilian and Scandinavian aid these states broke away.
The world is current in a state of Cold War between Germany and her allies, and the Franco-Russian Alliance.
Scandinavia, Japan, Britain and the other Great powers do their best to stay neutral, though most tend to favour the German camp.
*I'm using the flag of the Free state of Prussia as a placeholder. The Proper flag of Prussia won't work on Wikipedia for me for some reason.