# Head
Example of a typical head
. This part contains meta data about your Web page and imports CSS stylesheets, JavaScript libraries.
``` html
lang
attribute. The first value is the language code, the second the country code.
```html
```
[Language Codes](https://www.w3schools.com/tags/ref_language_codes.asp)
[Country Codes](https://www.w3schools.com/tags/ref_country_codes.asp)
```html
```
The `viewport` information is important to render your page good on different screen sizes (laptop, mobile devices):
```html
```
```html
```
Refreshing a page through the meta tag is probably more useful for development or experimental pages. There are more sophisticated methods for dynamic web pages.
## Property
Properties are used to define structured information, which can be accessed by other services, for example when you share a link via a messenger or social media.
```html
```
The properties defined will lead to a different preview of your page when you share it. See the difference on the following pages (and inspect them if you're interested.)
![meta_property_share](img/meta_property_share.jpg)