Should I put a space after a comma in the meta keywords tag?

Question

In some meta tags, for example, <meta name="viewport" content="width=device-width, initial-scale=1.0">, I put a space after each comma. Should I do the same for the meta keywords tag? I am asking this because I am not sure if putting a space after the comma will put a space before the following keyword.

Answer 1

It doesn't really matter. You can put it. Putting an extra space after a comma provides better readability to humans and nothing else.

For example, kind of confusing:

<meta name="keywords" content="keyword1,keyword2,keyword3,keyword4">

Now if you look at this, it provides better readability, isnt't?

<meta name="keywords" content="keyword1, keyword2, keyword3, keyword4">

Answer 2

Both works, you use it or not. The only thing is ',' should be used to separate various keywords or values you would like to use.