Short answers, pulled from the story.
Augustus finished writing the text one month before his death on the 19th of August AD 14. The document contains thirty-five distinct paragraphs plus a final addendum written in the third person.
Surviving copies appear carved into stone monuments at three specific locations within modern Turkey. A nearly complete Latin version and its Greek translation survive on a temple in Ancyra known today as Ankara, another copy exists in Apollonia written entirely in Greek, and a third appears in Antioch using only Latin.
Greek versions contain errors not present in the original Latin text and phrases were rephrased to be more comprehensible to provincial audiences unfamiliar with complex Roman legal terminology. The beginning of the Greek text omits details regarding Roman conquests that appear in the Latin version while translators prioritized meaning over literal accuracy.
The text covers only years between 44 BC and AD 14 from Augustus perspective alone without providing a full account of every event during those decades. Enemies never receive names within the document itself and Augustus presents facts relating exclusively to himself while omitting opposing viewpoints entirely.
Mussolini utilized the ancient text in 1937 during the two thousand year anniversary of Augustus birth to seek legitimacy for his political agenda using these historical parallels. Fascist movements in Italy co-opted symbols like the Res Gestae by the 1920s to justify conquest and Hitler visited the monument expressing admiration for the work during his travels.