After publishing an article, enhance its on-page SEO by optimizing the title and meta description with relevant keywords, ensuring a clean and descriptive URL structure, and adding internal links to other relevant content on your site. Optimize images with descriptive file names and alt text, improve readability with clear headings and short paragraphs, and confirm that the article is mobile-friendly. Finally, monitor the article's performance using analytics tools and make adjustments based on the data to improve its effectiveness.