Name:
this is the name that shows up in BlockLauncher's manage addons page
Package:
this is a name that must be unique to your package. should be in all lowercase.
No other package can have this name. Usually contains your domain name in reverse DNS form: for example, if your website is zhuoweizhang.net, your package can be net.zhuoweizhang.potatosmasher.
If you don't own a domain, you can use your e-mail in reverse (com.gmail.swagyolomastertwothousand.potatosmasher) or a Weebly/Wix/Google Sites account in reverse (com.weebly.swagyolomastertwothousand.potatosmasher)
MCPE version:
this is the Minecraft PE version that your mod will be compatible with(Example: 0.11.0)