You add keywords to HTML pages by including the Meta Keywords tag inside the Head section of the code. You then insert a list of keywords relevant to your business in the Meta tag.

When you're curious about the keyword tags that a business competitor is using, look for the keywords meta tag on the business's Web pages.

Boost your SEO with effective meta and HTML tags. Learn how to optimize your website with meta tags for improved search engine rankings.

An HTML tag that identifies the contents of a Web page for the search engines. Meta tags are hidden on the page, but they, as well as all the HTML code on a page, can be viewed by selecting View ...

Google on How it Handles Extra Meta Descriptions and Title Tags Google's John Mueller's answer provides a glimpse into Google's strategy for handling invalid HTML and mistakes.