1. "Also" as an introductory word:
* Yes, use a comma.
* Example: "Also, I would like to add that..."
2. "Also" as a conjunction:
* No, don't use a comma.
* Example: "He is a good student and also a talented athlete."
3. "Also" as a modifier:
* No, don't use a comma.
* Example: "The also available blue version is very popular."
In doubt, consider the following:
* If "also" introduces a new independent clause, use a comma.
* If "also" is part of the same clause, don't use a comma.
Here's a quick summary:
| Use | Comma? | Example |
|---|---|---|
| Introductory word | Yes | Also, I'm not sure about that. |
| Conjunction | No | He's funny and also very smart. |
| Modifier | No | The also available green color is nice. |