Some basic things you need to do (I can enlist 300 things)
but see it as Kaizen: continuous improvement. They will all add something to your ranking
1) esthetic improvements: make sure your customer does not run away when they arrive somewhere on your homepage
2) change title fonts (this increases the value of the keyword)
3) make sure your website is responsive: (so you can view it on any device: mobile, labtop, computer) this means you need to select a theme that is responsive from the start! any platform you use to make your website (drupal, wordpress, joomla, ...)
4) install an SEO module, with help of this add SEO titles and descriptions on all pages
5) finalize by sending the sitemap to Google, and Google search console, so it get's good indexed.
6) use small size pictures, so your page loads quicker
7) host your website on 300 servers worldwide, the user gains a millisecond in speed, hardly noticed, but Google measures this and will put your score higher
8) link internally on your website is easy: and make dedicated landing pages for your keywords or phrases
9) link link link link,....: your external links from other websites are 1000 times more important then your internal links, make sure when somebody places a link to your website, that on that page where the link is, the keywords that you want to be found on are also placed.
10) content = king, blog every day, blog about inquiries, make sure when adding a picture you name it after the keyword you want to be found.
11) use as a search function on your website directly the Google Search API in the back-ground. So the results you see on the website, are those that Google will generate. Each search will thereby further amplify the score of your website.
12) make sure your landing pages are not having a very long site/products/new products/new product.html, but that it is site/new product.html
13) make sure you install the updates of your software, and don't forget to update the plugins
14) make sure every page has enough descriptive text, and is not just a list
15) make the site user-friendly, so people do not have to scroll to much down, (Google measures this)
16) do some research: make a summary of your 15 most important keywords, list your 5 most competitor Url's to look for their keywords and utilize this information to do your SEO optimization, You can also find SEO keywords by looking for synonyms on google add words suggestions and also neilpatel.com
17) get google business reviews
18) actively google for forums with questions about your products and post links in a subtile way, you can also post questions on these forums and answer them with another google account
19) become member of facebook & linkedin groups: discuss on hot topics and provide information with links, answer actively on posts