1. When "such as" introduces a list:
* Comma: If "such as" introduces a list of items within a sentence, you usually use a comma after "such as".
* Example: "There are many fruits, such as apples, oranges, and bananas."
* Colon: If "such as" introduces a list that is a complete sentence or a very long list, you can use a colon after "such as".
* Example: "There are many fruits such as: apples, oranges, bananas, grapes, strawberries, blueberries, and pears."
2. When "such as" introduces a single item:
* No punctuation: If "such as" introduces only one item, you don't need any punctuation after it.
* Example: "The company has a variety of services, such as website design."
3. When "such as" is part of a phrase:
* No punctuation: If "such as" is part of a phrase that doesn't need punctuation, you don't need any punctuation after it.
* Example: "The company offers services such as website design and marketing."
In summary:
* Use a comma after "such as" if it introduces a list of items within a sentence.
* Use a colon after "such as" if it introduces a list that is a complete sentence or a very long list.
* Don't use any punctuation after "such as" if it introduces a single item or is part of a phrase that doesn't need punctuation.