SEO stands for search engine optimization — that much has stayed the same. It refers to techniques that help your website rank higher in search engine results pages (SERPs). This makes your website more visible to people who are looking for solutions that your brand, product, or service can provide via search engines like Google, Yahoo!, and Bing.
What hasn’t stayed the same are the techniques we use to improve our rankings. This has everything to do with the search algorithms that these companies constantly change.