Titles, headers and meta descriptions are important aspects of on-page SEO. Every page on a site should have unique content in its <title> tag – in other words, don’t copy and paste the same title across your whole site. Each page’s title should include at least one keyword that’s relevant to the content on the page. Likewise, include keywords in the header tags on each page, especially the <h1> tag.
Meta descriptions – the blurbs that appear under links in SERPs – are a little different. They don’t directly affect SEO, but they do impact how many people click on your site in SERPs. They’re basically free advertising space, so put some thought into them, and include your main keywords to catch searchers’ eyes.