A good click-through rate (CTR) for Google Shopping can vary depending on several factors such as the industry, competition, and the quality of your product listings. However, as a general guideline, a CTR of 2-5% is considered average, while anything above 5% can be considered a good CTR.

It's important to note that CTR alone should not be the sole metric for evaluating the success of your Google Shopping campaigns. Conversion rate, return on ad spend (ROAS), and overall sales should also be taken into consideration.

Let's consider an example to illustrate this further:

Suppose you are running a Google Shopping campaign for a fashion retail store. Your ads receive 10,000 impressions (the number of times your ads are shown) and generate 300 clicks. To calculate the CTR, divide the number of clicks by the number of impressions and multiply by 100:

CTR = (Clicks / Impressions) * 100

CTR = (300 / 10,000) * 100

CTR = 3%

In this example, a 3% CTR would be considered average. However, if your CTR is consistently higher, say around 5% or more, it indicates that your ads are resonating well with your target audience, leading to a higher likelihood of conversions.

It's important to keep in mind that CTR can vary across different industries and product categories. Therefore, it's recommended to benchmark your CTR against competitors in your industry to get a better understanding of what can be considered a good CTR for your specific niche.

For more information and insights on Google Shopping performance benchmarks, you can refer to industry reports, case studies, and Google's own documentation on optimizing Google Shopping campaigns.

References:

1. Google Ads Help: https://support.google.com/google-ads/answer/2615875?hl=en
2. WordStream: https://www.wordstream.com/blog/ws/2019/07/10/google-shopping-ads
3. Search Engine Journal: https://www.searchenginejournal.com/google-shopping-ads/275643/#close