According to my observation, you every body should maintain the following top 5 Tips to improve rank of website whatever its WordPress, Shopify, Wix based etc. My tips is only for beginner not for the highly experienced SEO Experts. So lets take a look at the five points-
1. Make relevant content for your website.
2. keep and Update your content regularity.
3. Metadata- a) Title Metadata b) Description Meta Data (Google does not care it now) c) Keyword Metadata.
4. Make relevant link e.g. Dont link eCommerce with university website.
5.Image ALT tag, Use Image alt tag for all image used in your website.
I will come with another tips for the beginner soon. you all are invited to suggest me for the topic.