Once your project is created, you can see your project on Google Developer Console Dashboard, then you need to click the “Enable APIs and Services” Button, then you will go to the Google API Library, Select the “Custom search API” and Enable it.
Step 3: Create credentials
After Enable Custom Search API, you need to create credentials for our plugin.
Step 4: Save Your API Key
Finally, We get our API Key, now you just need to copy this value on our plugin setting page.