There are a number of ways to add keywords in your website html for seo. Using the right combination can help your content get noticed by search engines. It's important to remember though that not all of these techniques will work well for all websites. There are certain rules and best-practices that you need to follow to ensure success.
Title Tag
The first and most important place to include your keyword is in the page title. This is the first thing that search engines will look at when scanning your content and it's also what Google displays under the link for any search query. You can use up to 65 characters in your title, but the first few words are usually given the most importance.
Meta Description
The meta description is another area where you can use your primary keyword. This is the short summary that shows up under the title in Google's search results and it's an important part of a page's content. However, using too many keywords here can come off as spammy and will hurt your overall SEO.
Alt Text
Finally, you can use your keywords in the alt text of images on your web page. This is an area that is largely ignored by most webmasters, but it can be useful to have keywords here because it will allow your content to show up in image searches. However, it's important to keep in mind that these are not a major ranking factor for most search engines.