Personally I have used keywords to rank different websites with little or no content promotion strategies.

Keyword research contents gives good search traffic.

In fact, keyword researching, adding to blog posts and websites makes the work of targeted traffic easier for both bloggers and SEO experts.

So if you need search traffic to your blog or website or online store, simple do keyword research, that's your best bet.

It's not the only strategy to gain search traffic to blogs or websites, other strategies exist, but it's very crucial.

Keyword research is second most important aspect of search traffic after audience research

4 Benefits Of Using Keywords Research
a) Free Search Traffic: Good keyword research gives us free search traffic to our websites and blog.

b) Ranks High on Google search: It enables our website or blog to rank high on google search due to good search traffic volumes

c) Position Your As Authority: When you get good search volume on your website and ranks well, visitors would see you as an authority and great source.

d) Quality Back Links: When your audience see you as an authority, they use your links on their websites and blog as references, thereby giving you more back links traffic from their audience.

Note: keywords research can never replace websites user experience, audience research, content promotions etc so balance everything.

Comment below if you need help on keywords research on your contents, or any related questions will be glad to help.