"so, therefore" — draws a conclusion from what was just said. Also a common filler ("also, …") like English "so …". Position 1 triggers inversion.
Konjunktionaladverb konsekutiv — Schlussfolgerung; auch Füllwort.
Порядок слов
Hauptsatz 1 (Prämisse)
Subj.
V = 2.
…
,
Du
lernst
jeden Tag
,
Hauptsatz 2 mit also (Schlussfolgerung)
Konj.-Adv.
V = 2.
Subj.
…
also
machst
du
Fortschritte.
A Konjunktionaladverb takes POSITION 1 of the second clause, so the verb lands in 2nd and the subject is pushed after the verb (inversion). This is the key difference from coordinating conjunctions (und, aber, denn), which stand outside position 1.
§Значения
so, therefore
konsekutiv: Schlussfolgerung
нейтральное
Du bist müde, also schlaf gut!
— You're tired, so sleep well!
so…, well…
Füllwort / Diskursmarker am Satzanfang
разговорное
☞ In this role — a discourse marker before a longer explanation.
Also, ich denke, wir sollten gehen.
— So, I think we should go.
"also" as a filler particle
Very often "also" starts a sentence as a discourse filler: "Also, … ich denke, …". In that role there's no inversion — a full main clause follows the comma. This is not the conjunctional "also" but a discourse particle.