# Special Tags

Special tags are tags with built-in behavior. They are used to decorate statements to obtain specific plugin behaviors.

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## <span class="tag">Once</span>
This Special Tag can be used if you want a statement to play only once, doesn't matter how many times the script flow passes through that point.

```q #
- Shopkeeper | #once
  Greetings traveler!
  Welcome to the shop of the great wizard, Zeddicus.

- Shopkeeper
  How may the great Zeddicus be of service to you today?

$ ShowShopInventory

```

!!!warning
**Keep Visited Statements** must be enabled in [Quillscript Settings](../../coding-and-design/settings/) for this tag to work
!!!

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## <span class="tag">Mark</span>
The #mark tag is used to tell the Interpreter to store a counter of how many times this statement played when the Keep Visited Statements setting is turned off.

```q
$ a = 10 | #mark
```

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