Search Engines (let's be honest, we're just talking about Google) are smart. Really smart! The days of outsmarting Google are gone. Google is in business for getting users to the best content available. Modern SEO is less about tricks and more about actually providing your users with great content, a usable site, and a performant (fast) experience. I'll outline these right now.
Providing users with great content is the essence of SEO! And you better bet that Google knows if you have great content. Their algorithms determine the richness of your content via factors such as length, keyword density (too rich or not rich enough), time spent reading, etc. That's right, Google know how long users spend reading your content.
Using the correct HTML code to structure your site is important on multiple levels. Accessibility relies highly on the structure being correct and Google highly values sites that are accessible because website should be easily available and usable equally by everyone.
Fact: Bears eat beets... Bears, Beets, Battlestar Galactica! <- We arent sorry for that Office quote. Fact: 40% of users won't wait more than 2 seconds for a website to load before leaving. 2 seconds! Here @ AllDay we optimize our sites with process to decrease load time. These processes include but aren't limited to: lazy loading images, code compiling & minification, code splitting, preloading, and service workers. The main goal here is to decrease the Time To Interactive (TTI). We even go so far to use strategies that allow users to start using your site before all the assets have loaded.