Will my product title change in Shopify if I edit the title in Etsy Feed app?

Here is how your product title gets affected if you edit the title using Etsy Feed app.

No, when you edit your product title in the Etsy Feed app, only your feed title in your Etsy shop manager gets updated. The titles in your Shopify remains unaltered.

You are given a 150 character limit to optimize your feed title. This implies that you can make your product title more keyword-optimized to serve Shopping Ads well. The more you ad relevant and high search volume keywords, the higher your chances are that your product will perform better.