Search engine optimization (SEO) is a process that improves the quality and quantity of traffic to a website from organic search engines. SEO targets unpaid traffic rather than paid traffic. It is a long-term strategy that requires ongoing investment and technical decisions, and it delivers lasting benefits when done consistently.
SEO rests on four core pieces: choosing the right keywords, publishing content that answers them, earning links from other sites, and turning the resulting visitors into customers through conversion rate optimization. Each of these targets a different part of how a site attracts visitors, ranks in search results, and produces revenue.

What are keywords in SEO?
Keywords are the words you use on your website to help search engines understand what your content is about. The more relevant the keywords are to what a user is looking for, the better chance they have of finding your content.
When choosing keywords, consider the intent behind a query. For example, someone searching “nft marketplace” is most likely looking for navigational content that will take them to NFT platforms.
Also weigh whether the keywords are useful for your business. A lawyer, for instance, would not benefit from ranking for “free business growth tips.” And consider the value of the traffic: ranking on a high-volume keyword like “free business growth tips” does not deliver a profitable return if you charge $10,000 for a year of consulting services.
Why does content matter for SEO?
Content helps attract visitors and convert them into customers, improves the user experience, and builds trust with search engines, which leads to better rankings.
Content can be created for products and services as well as for blog posts. It should be high-quality and authoritative so search engines and users understand what you offer.
SEO content writing involves finding keywords related to your business and creating content that answers those terms. It also includes optimizing your site’s structure and formatting to make it easier for search engines to find.
Search engine bots comb through your website to gather information about the content on each page and use that information to create an index, which they use to rank pages for different searches.
How does link building help SEO?
Link building is one of the most effective methods for SEO. Links are like votes for your website, and they help Google determine how authoritative your site is.
You should always strive to improve your link profile. This helps build trust with Google, which is an important factor in search ranking.
Link building is not a strategy you can execute overnight, but it can significantly increase your search engine rankings and traffic when done properly. It also boosts your brand and credibility.
Some strategies should be avoided. Black hat SEO, for example, can lead to your website getting banned from the search results and negatively impact your business.
How does conversion rate optimization fit into SEO?
Conversion rate optimization is the process of increasing the percentage of visitors who take a desired action on your website, such as buying a product or downloading an eBook.
The goal is to convert that traffic into paying customers, not just increase the number of visitors. A conversion rate is the percentage of site visitors who make a purchase or sign up for your email list. The specific metrics you track depend on your business and how you are trying to grow it.
Many of the quick CRO “hacks” found online aren’t relevant to a particular business. Instead, focus on developing an in-depth understanding of your users and what they are looking for, then deliver the value they are searching for. That is how conversion rates go up.
FAQ
What is search engine optimization (SEO)?
Search engine optimization is a process that improves the quality and quantity of traffic to a website from organic search engines. SEO targets unpaid traffic rather than paid traffic.
What are the main components of SEO?
The main components covered in this guide are keywords, content, link building, and conversion rate optimization. Each one targets a different part of how a site attracts visitors, ranks in search results, and turns visits into customers.
Why is SEO a long-term strategy?
SEO requires ongoing investment and technical decisions. It is a challenging and tedious process, but it provides lasting benefits over time, unlike short-term paid traffic campaigns.
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