You can add style to an element by it in the style element and setting a property for it like this:
element {
property: value;
}
Center your h1 element by setting its text-align property to the value center.
The point they are making is that you should replace the word “property” with “text-align” as that is the property we are defining. And, replace the word “value” with “center” as we want the text alignment to be centered. So copy and paste the template code they gave you and just replace the property and value with the given property name and value.