I have created a recommendation based on top-seller products across site criteria but it is not working I am not getting any data. do I need to provide any additional information to target for this algorithm to run?

I am new to Adobe Target Recommendations. I have created two recommendations on the home page based on the "most viewed items across the site" and "most selling item across the site" algorithms and they are working as expected but my question is how Target knows they the are most viewed products and...

I want to implement target on android App. I am beginner to App please step by step.

In Home pages I want to create a recommendation  'Trending products' . Recommendations should be only one product from each category w.r.t category priority listPriority list:WorkbagsTotesShoulder bagsHandheldsOrganisersSlingsBackpacks