How many Smart Shopping campaigns should you create to maximise performance? 

• Create as many as 150 Smart Shopping campaigns to test performance and optimisation. 
• Consolidate your Smart Shopping campaigns and only create separate campaigns when necessary. 
• There's no limit to Smart Shopping campaigns because machine learning will optimise one Smart Shopping campaign over another. 
• Launch at least 100 Smart Shopping campaigns per account and optimise based on performance. 

Answer: Consolidate your Smart Shopping campaigns and only create separate campaigns when necessary.