How to handle multiple values in meta robots?

Question

About the meta-robots, how many values can I put?

<meta name="robots" content="noindex, follow, nocache, nosnippet, noodp, noydir">

Is this valid? Or multiple meta elements?

<meta name="robots" content="noindex, follow">
<meta name="robots" content="nocache, nosnippet">
<meta name="robots" content="noodp, noydir">

Is this possible?

What is the best practice?

Answer 1

As you mentioned in your question's first code block;

<meta name="robots" content="noindex, follow, nocache, nosnippet, noodp, noydir">

It is valid. You can combine them with commas use it in under 1 tag.
You can also find some good examples in this link