Updates description

docs/tokens.md

@@ -1,3 +1,3 @@
-### Tokens are the atoms of the system. Specifically, they are named entities that store visual design attributes. They allow us to maintain a scalable and consistent system when used instead of hard coded values.
+### Design tokens are the atoms of the system as [Salesforce](https://www.lightningdesignsystem.com/design-tokens/) describes them. In Vue Design System they are used instead of hard coded values to ensure a better consistency across any platform.
 
 You’re looking at Vue Design System’s demo <code>design tokens</code>. Everything you see here is editable in Markdown format. To change or remove this content, see [/docs/tokens.md](https://github.com/viljamis/vue-design-system/blob/master/docs/tokens.md). The documentation you see below is auto generated by Vue Design System. To edit how it’s formatted, see [/docs/components/tokens/](https://github.com/viljamis/vue-design-system/blob/master/docs/components/tokens).