1. Make sure your pages can be indexed
Before optimizing anything, confirm your important pages are actually in Google's index. Check coverage in Google Search Console and fix blocked or excluded pages.
2. Fix titles and descriptions on money pages
Collections and top product pages first. Each needs a unique title built around what people actually search, and a description written to earn the click.
3. Add structured data
Product, review and breadcrumb schema help search engines understand the page and can improve how your listing appears.
4. Then invest in content
Buying guides and comparison content attract people earlier in the decision, and give your collection pages something to link from.