In Opinew you can link products into groups and those products will share reviews with each other.
If you have a blue car and a red car and link them, when somebody leaves a review on the blue car, that review will also appear on the red car (and vice versa). The same goes for imported reviews.
Step 1: Head over to “More > Link Products“
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Step 2: Press the “Create a group” button
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Step 3: Add a name in the “Group name” field
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Step 4: Select the products you want to group from the list displayed
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Step 5: Finally, press the “Create” button.
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