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.
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">