You should Implement AMP, Structure data, canonical tag, liquid design etc.. also common thing which is below mention
E-commerce On Page Activities:
* Site Structure
* Keywords
* Page URL
* Alt-text of images
* Title tag
* Meta-descriptions
* Content
* Internal Links

E-commerce Off Page activities:
* Social media
* Social bookmarking
* PPT Sharing
* Guest posting
* Classified Submission
* Image Sharing
* Video sharing
* Email Marketing
* Website Reviews
* Products Listing

Now days also google sticky follow user friendly-ness. also, more Google algorithms active and running as per my suggestion you should go with Best Professional SEO services provider which helps you Increase ROI For Your Business‎ with High Quality SEO Services and Page Ranks. Drive Business Leads With Strategic Keywords And Search Marketing.

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