Hello, I'm being new to Salesforce REST API. I am currently getting started on this page: https://developer.salesforce.com/docs/atlas.en-us.api_rest.meta/api_rest/intro_rest_resources.htm

According to the instruction, in order to access the Version resource, we need to access the url  https://yourInstance.salesforce.com/services/data/

My question is what I should use to replace yourInstance here? The instruction in yellow box on https://developer.salesforce.com/docs/atlas.en-us.api_rest.meta/api_rest/intro_rest_resources.htm saying that I should "Replace that text with the instance for your org." However, how do I know what is the instance for my org? 

Hello, I'm being new to Salesforce REST API. I am currently getting started on this page: https://developer.salesforce.com/docs/atlas.en-us.api_rest.meta/api_rest/intro_rest_resources.htm

According to the instruction, in order to access the Version resource, we need to access the url  https://yourInstance.salesforce.com/services/data/

My question is what I should use to replace yourInstance here? The instruction in yellow box on https://developer.salesforce.com/docs/atlas.en-us.api_rest.meta/api_rest/intro_rest_resources.htm saying that I should "Replace that text with the instance for your org." However, how do I know what is the instance for my org?