Do I use , <>, >

Answer 1

I would personally use an tag because if you do you have full control over it. If you do use it in you don't get to control the innards of the SVG with CSS etc.

another thing is browser support.

Just open your svg file and paste it straight into the template.

then in your css you can simply eg:

svg {
  fill: red;
}

Some resource: SVG tips