This action of Google Cloud can help attract new customers and increase its market share in the cloud service industry.

Previously, Google Cloud charged customers who wanted to transfer their data to competing cloud service providers based on the amount of data transferred. This could have prevented customers from leaving Google Cloud.

By eliminating data transfer fees, Google Cloud has removed this barrier for its customers. This can help attract customers looking to move to competing cloud service providers.
In addition, eliminating data transfer fees can help increase transparency and competition in the cloud services industry.
Google Cloud isn't the first cloud service provider to eliminate data transfer fees.
 Here are some other examples of cloud service providers that have eliminated data transfer fees:
Amazon Web Services (AWS)
Microsoft Azure
IBM Cloud