A little bit of help understanding Meta Tags?

Hello,

We have a blog website in the tech industry. Currently, we are putting in one new custom meta tag for keywords into each blog post like this (pretend this blog post is related to a new Samsung TV):

<meta name="keywords" content="Samsung TV, Model xxxxx, Smart TV's, 4K TV"/>

Are we using this feature right or are we way off the mark? My understanding is having a custom keyword meta tag would help with SEO?

Thank you