What is SEO?
SEO (Search Engine Optimization) is the practice of improving a website's visibility in unpaid (organic) search results. The goal is to rank higher for queries your target audience is searching for, which brings more qualified traffic without paying per click.
Modern SEO has three interconnected layers. Technical SEO ensures search engines can crawl, index, and understand your pages. On-page SEO aligns your content with the intent behind target keywords. Off-page SEO builds authority through backlinks and external signals.
How SEO works
Google's algorithm uses hundreds of signals to determine rankings. The core ones include content relevance, page experience (Core Web Vitals), site authority (measured by backlinks), and entity clarity (how well Google understands who or what your site represents).
Effective SEO compounds over time. A well-optimized page continues to earn traffic months or years after publication, making it one of the highest-ROI channels for businesses with 6+ month investment horizons.
Example
Example
A SaaS company ranks on page 1 for "project management software for agencies" without paying for that click. That is SEO at work.
Frequently asked questions
What are the three layers of SEO?
Technical SEO makes pages crawlable and indexable, on-page SEO aligns content with search intent, and off-page SEO builds authority through backlinks and external signals. All three compound together; none works in isolation.
How long does SEO take to show results?
Meaningful movement typically takes 3 to 6 months, with compounding returns after that. A well-optimized page keeps earning traffic for years, which is why SEO suits businesses with a 6+ month investment horizon.