If you know how to do SEO optimization of your website, it would be free of cost because you just have to put time and stretagy.
Free ways to increase your Google rankings for free
- Improve your content, put quality and unique content on the website
- Put your keywords in URL structure on relevant web-page
- Optimize your web-page speed
- Create blog page and post frequently
- Add SEO optimized meta title and description
- Use headers (h1 and h2),which helps crawlers to read and understand your content.
- Focus on quality and natural link building
- Make your website mobile friendly
- Setup search console and analytics for reporting and analysis
- Optimize you robots.txt and sitemaps
Additional – As Google ads is a paid advertisement but running campaigns doesn’t increase your ranking so if your are looking for free organic promotion so i suggest you to do SEO.