In simple words
Mithuna is the Vedic name for the sign Gemini. It is ruled by Mercury and is dual (adaptable).
If your Moon was in Mithuna, read "As your Moon sign". If Mithuna was rising when you were born, read "As your lagna". Your chart page in Vedic mode shows both.
As your Moon sign
With the Moon in Mithuna, your mind is curious, quick and always making connections. You process feelings by talking and reading, and variety keeps you happy. Restlessness can appear when life becomes too routine.
As your lagna (rising sign)
With Mithuna rising, you appear youthful, witty and adaptable. Communication, learning and networks shape your path. A grounding routine helps you turn many interests into lasting results.
Growing with Mithuna
Choose one subject to master this year. Depth gives your bright mind a home.
Vedic signs are measured from the stars (the sidereal zodiac), about 24° behind the Western ones. That is why many people's Vedic sign is one sign earlier than their Western sign.