in here creativelearnings is just a keytool name which is used to sign your released apk
// key tool generate
keytool -genkey -v -keystore creativelearnings.keystore -alias creativelearnings -keyalg RSA -keysize 2048 -validity 10000
//released apk build
ionic cordova build –release android
//after release command copy your release apk to main folder where you run ionic serve then
jarsigner -verbose -sigalg SHA1withRSA -digestalg SHA1 -keystore creativelearnings.keystore android-release-unsigned.apk creativelearnings
//zip align
C:\Users\99fus\AppData\Local\Android\sdk\build-tools\27.0.3\zipalign.exe -v 4 android-release-unsigned.apk creativelearnings.apk