Wildcard selector

1、 Concept
The wildcard selector uses * To express , The asterisk is to select all labels . It is the most widely used of all selectors , Can match all elements of the page
2、 grammar
{ attribute 1： Property value 1; attribute 2： Property value 2; attribute 3： Property value 3;}
*{
marjin:0;
padding:0;
}
Be careful ： Will match all the elements in the page , Reduce page impact speed , It is not recommended to use it casually