YouTube
YouTube has grown into a massive search engine and resource for research. Use the site to watch videos about the trending products of the time.
Appropriate Designs For Merch By Amazon
Merch By Amazon Tier Ups
Reviews and Long-term Profits
Low BSR and Consistent Sales
High royalties
Market average
Conclusion
Google Trends
Use Google trends to find out how products of your consideration are performing in the market before making a final decision.
Study Online Marketplaces
Seek information from existing online marketplace tools. You will discover the top selling items in the stores. This is not as easy as it sounds