I read about Opportunity Object and OpportunityLineItems and sub object in Opportunity named Opportunity Product Object.Is OpportunityLineItems and Opportunity Products are same thing or different?? if different what is the difference.Please clarify.

Attribution to: user133421

Possible Suggestion/Solution #1

Yes they are the same : Salesforce official doc

Name: The opportunity line item name (known as “Opportunity Product” in the user interface).

Attribution to: melmoussaoui
This content is remixed from stackoverflow or stackexchange. Please visit https://salesforce.stackexchange.com/questions/30994