html - CSS Angular Tag <

Question

What is the use of using angular tag in css

ie,

.class << span

but Normally we are using these types of tag

body
{
    background-color:#d0e4fe;
}
h1
{
    color:orange;
    text-align:center;
}
p
{
    font-family:"Times New Roman";
    font-size:20px;
}

Answer 1

It's not valid CSS. > is the child combinator but < and << are meaningless in selector syntax.