YES! SEO is more vital than ever to optimize your page for search engines, and there are some major changes in algorithms (Change Constantly) that could affect how people rank. But SEO won't work if you're still using old tactics like creating more links without focus on relevancy and authority and creating low-quality content that has no worth for the readers. These tactics do not have as much value anymore because Google will look at other factors like quality content, user responses, quality website pages with proper mobile usability when making its decisions about which sites should get higher rankings on SERPs (search engine results pages).