I'm literally new to Azure , I need some guides :"(
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As you can see , I have successfully published my .Net backend to the service , and I do a little bit code first inside it ,
I'm so confused where to check the changes (new tables created by code first) on Azure after publish successfully ?
You need to use something like Fiddler or (my favorite) Postman to check out your tables; or write a mobile client.
Check my book out - http://aka.ms/zumobook - it will guide you through the process. Alternatively, there are a set of quickstart tutorials on the Azure Mobile Apps documentation: https://learn.microsoft.com/en-us/azure/app-service-mobile/; or you can read the "30 Days of Azure Mobile" blog series at https://shellmonger.com/