What is Xcode's Organization Identifier?
<p>I have some questions around the Organization Identifier when creating a new project in Xcode.</p>

<p><a href="https://i.stack.imgur.com/3mTJf.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/3mTJf.png" alt="Creation of new project in Xcode"></a></p>

<p>With a quick search, I have found that the Organization Identifier is used to identify your app.</p>

<p>My questions are the following:</p>

<ol>
<li>Should I choose a unique identifier between my apps or between developers?</li>
<li>Usually, the <code>com</code> at the beginning of the identifier is used to identify that the following word describes a company? Is that something to do with the domain-notation like <code>org</code>, <code>net</code> etc?</li>
<li>Finally, any suggestions when creating this identifier? What problems can this identifier create if not set properly in the first place?</li>
</ol>