On-Page SEO refers to the optimisations you make on your website to better your chances of organic rankings on SERPs (Search Engine Results Pages). Some core on-page SEO features are:
- Meta Titles
- Meta Descriptions
- Header Structures (H1-H6)
- Alt Tags
- Title Tags
- Internal Linking
- Keyword Relevance
- Long-Tail Keywords
Learn more about SEO here.