It says, "Apple has approved your application/build, you need to release your application build for public use (or available publically)"
Here is ref document from apple, what it says, about this:
Pending Developer Release
Your app version has been approved by Apple and is waiting on you to release it.
Release the version to the store when you’re ready. See Specifying When App Versions Are Released.
How to release your build
Follow these steps to release your build:
- Login into your Apple Developer Account and Select your App
- Now select your most recent application version (which is showing a version name with status.
- Scroll page to 'Version Release' section and process for build release.
Here is sample snapshot (from Apple):

Edit according to query from OP:
Will my app become available for my country also, if I release it on App store? It is not currently released and when I click on link 'View on App Store', it is showing me an error, " It's not available in your country's store"
Answer: Yes, It will show your app in for your country also, if you've selected (not deselected/skipped) from list of all countries.
You can find list of countries here and skip any if you want, by deselecting it:
In your iTune Accoun: (Go To) >> Pricing and Availability >> See 'Territory Availability'

Sample list of available countries:
Note: Your profile says, your current country is 'Lebanon' and it is allowed by Apple on App Store, see below snapshot
