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What Is SEO? Understanding Search Engine Optimization in 2025

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The primary goal of SEO is to drive organic (non-paid) traffic to a website by improving its relevance and authority in the eyes of search engines. SEO has evolved significantly since its inception in the early-1990s. It began with webmasters manually submitting URLs to search engines and including keyword-rich meta tags. Early search engines, like AltaVista and Infoseek, used these tags to index content. The late 1990s saw the rise of Google, which revolutionized SEO with its PageRank algorithm, focusing on the quality and quantity of backlinks.

And this little shortcut helps me use internal links without having to analyze every page on my site. That said, you don’t just want to add a bunch of random internal links. Yes, random internal linking is probably better than no internal linking at all. It’s a free tool that tends to BHS Links give a more accurate feel of how your site loads to actual users.

Everything You Need to Learn SEO

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  • By improving your SEO, you can work to expand your visibility on the search engines.
  • Showing up in their search results aligns with an existing demand—your customers are actively seeking information, products, or solutions.
  • Once you know which keywords to target, your next step is checking out SEO competitors already ranking highly for those terms.
  • For example, you might have seen this voice search SEO study that we published on the Backlinko blog a while back.

How to Write SEO Content

what is seo

So I can’t cover everything there is to know about finding keywords here (I have a separate dedicated article all about SEO keywords for that). But even when written content is the answer, you need to ensure it’s the right type of written content for your target audience. In fact, we regularly publish content on Backlinko that’s specifically designed to rank in Google.

what is seo

what is seo

But images, infographics and videos are super important for SEO. So I recommend writing a unique meta description for every page on your site. And make that meta description something that will make Google searchers want to click on your result.

what is seo

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