Muggles' Guide to Harry Potter/Magic/Transfiguration Today

Overview
Transfiguration Today seems to be a professional journal, read by the more advanced wizards interested in learning about new magical techniques.

Extended Description
It is mentioned that, when Harry is staying at The Leaky Cauldron after blowing up his Aunt Marge, there are elderly wizards sitting in the parlor, reading Transfiguration Today.

In Snape's memories, in Harry Potter and the Deathly Hallows, there is a scene where Snape is railing at Professor Dumbledore about what an awful student Harry is. Dumbledore is only giving Snape about half his attention; as he listens, he is reading Transfiguration Today.

Analysis
Just as there are mass-market periodicals like Witch Weekly, The Daily Prophet, and The Quibbler, there must be more professional publications that are similar to our scientific journals. After all, magic is not static; we hear that Wolfsbane Potion was invented recently by an uncle of Marcus Belby, and there are other advances alluded to in various places. While the mass media will trumpet the existence of such advances, when they happen, the professional journal will go into detail as to how the effects are achieved. Transfiguration Today is clearly such a professional journal.