**So,** (with a capital **S** and a comma) is commonly used at the
**beginning of a sentence** as a **sentence adverb** or **discourse marker**.
It often means:
### 1. To introduce a conclusion or result
> The roads were flooded. **So,** we stayed home.
= Therefore, we stayed home.
### 2. To continue or resume a topic
> **So,** where were we?
> **So,** as I was saying, the project began in 2023.
### 3. To introduce a question
> **So,** what do you think?
> **So,** how did the meeting go?
This use is very common in conversation.
### 4. To introduce a new topic or summarize the situation
> **So,** here's the plan.
> **So,** that's what happened.