Questions & Answers about Spieghi cosa significa questo dato e dica che ci importa.
Yes. They are formal commands addressed to Lei (the polite singular you).
In Italian, the formal imperative usually uses the present subjunctive form:
- spiegare → spieghi
- dire → dica
So:
- Spieghi ...
- Dica ...
mean Explain ... and Say ... when speaking politely to one person.
If you were speaking informally to one person, you would normally say something like:
- Spiega ...
- Di' ...