Answer: Need recognition stage
Explanation:
Based on the goal expressed by Steve Yancovich, eBay is trying to influence the need recognition stage of the buyers decision making progress.
They are doing this by employing processes that makes buying look attractive to the buyer and in relation with their needs. Some of the features they introduced for these process are their eBay fashion app, and the "try on" feature which allows buyers to have an idea of what they are buying.
