Using Adobe Target with the Platform Web SDK - how to pass custom context parameters

Hey team.
It is clear how to pass profile and entities parameters:

```
alloy("sendEvent", {
renderDecisions: true,
data: {
__adobe: {
target: {
"profile.gender": "female",
"profile.age": 30
}
}
}
});
```
and
```
alloy("sendEvent", {
renderDecisions: true,
data: {
__adobe: {
target: {
"entity.id": "123",
"entity.genre": "Drama"
}
}
}
});
```

Still it is not clear how to pass custom context parameters (mbox parameters), eg pageName.
Could you please include such details?

Thanks,
Alberto

Issue in ./help/edge/personalization/adobe-target/target-overview.md

Read ./help/edge/personalization/adobe-target/target-overview.md and review its existing guidance for profile and entity parameters. Add documentation explaining how to pass custom context parameters such as pageName, so readers can identify the supported request format.

Written by the indexing model from the issue text.