Deployment is the process of releasing your application or software out onto the specific environment where it will need to run: either web server or the Google Play Store or the App Store; which means it will then available to your users. There are a variety of ways of deploying code to make it available to the end-users. These methods involve varying degrees of difficulty in setting them up and various levels of downtime to your users. The deployment process differs for websites compared to desktop applications compared to Mobile apps. A good deployment process will ensure that only tested and satisfactory code is deployed to the end-users. This ensures that bugs and their effect are minimised.
An industry standard is to use a CI/CD stands for Continuous Integration and Continuous Deployment. CI/CD is the process of automating the deployment of your software through... tool to automate this process.