SEO 2018
These 3 pillars of SEO will be still be a factor in SEO in 2018:
Content is still important. Why? People use search engines to find what they need. How will these pages rank? A large reason why will the content on a given landing page. It needs to have keywords and be optimized for search, from a paid and organic search perspective.
Technical SEO is still important, especially if a website is going through a redesign or a redirect issue. A website needs to be optimized from a technical perspective because it can affect your organic rankings and even UX (user experience), depending on the website.
Analytics is essential to accurate and effective reporting. From Google Analytics to Google Tag Manager to Hubspot, no matter the industry a website is in, it is salient the data is correct so once can make the right decisions.