Some default quotas are provided to all the Google Compute Engine projects for various types of resources. The quotas can also be increased on the basis of per-project.
One can check the quota limits for the project on the quota page on the Google Cloud Platform Console.
In case, you find that you have reached the quota limit for your resources, and you want to increase the quota, then you can make a request to get more quota for some specific resources using IAM quotas page.
You can request more quota directly through the Edit Quotas button on the top of the page.