what are the difference of inline and embedded in CSS?hhm

Answer 1

inline is entering css style code by using style tag and and embedded is using style attribute in html tag
inline example
<style>
h1
{
color:white;
}
</style>

embedded example
<h1 style="color:white;" >header 1</h1>

Answer 2

it's define speeds of your page which is not good with seo point of view in these both cases