SEO stands for Search Engine Optimization. It is the practice of optimizing your website and its content to rank higher in search engine results pages (SERPs) organically, meaning without paying for placement. The goal of SEO is to increase visibility and drive more traffic to your website from search engines like Google, Bing, Yahoo, and others.

SEO involves various techniques and strategies including:

1. Keyword Research: Identifying the terms and phrases that users are searching for related to your content or business.

2. On-Page Optimization: Optimizing elements on your website such as meta tags, headings, content, and images to make them more relevant to your target keywords.

3. Off-Page Optimization: Building backlinks from other reputable websites to improve your site's authority and credibility.

4. Technical SEO: Ensuring that your website is accessible to search engine crawlers and optimizing factors like site speed, mobile-friendliness, and site architecture.

5. Content Creation: Producing high-quality, relevant, and engaging content that attracts visitors and encourages them to stay on your site.

6. Local SEO: Optimizing your website for local search results, especially if you have a physical location and want to attract customers in your area.

SEO is an ongoing process that requires monitoring, analysis, and adjustments to keep up with changes in search engine algorithms and user behavior. Effective SEO can help businesses increase their online visibility, attract more targeted traffic, and ultimately achieve their marketing goals.