Definitions

• A JOB contains an algorithm that describes exactly what you wnat to do it is a recipe(which step shoulb be execute in whic order)
  but unlike a function in java it is an object in memory which is created once the application is started. A job is a series of steps

• STEPS are executed one after another
  A step can be completed suceesfully even if the job has not jetzt been successfully processed

• JOBLAUNCHER: it is the coomponent on which you can define how you want to execute your jobs
  it helps you configure how the jobs will be procesed(synchronously other asynchronously)

• JOBPARAMETER: Thy are data you want to process or refenrence(database id, list of db id, url , path to a file )
  that means you can execute your job parameterised

Annotation: Helps to add piece of information(metadata) that will check and add during the compile time
annotation helps the Framework to understand what to do with your code