What is the diffrence between Data feed upload to google and API upload to google. How to implement API upload to google.
We typically support Google Shopping by upload a product feed to Google on a daily basis. That product feed contains a description of your product and abides by the rules set by Google as described here https://support.google.com/merchants/answer/188494?hl=en-GB
You can avail of this feature by going to your Webstore Manager then Products -> Products Feeds A screeshot is shown below:
Although the configuration and setup is straightforward, we are more than happy to provide any assistance if you have any difficulty with that.
We hope this answers your questions, if not please give us more details into what you are trying to achieve and we can have a look for you.