for the uninitiated like me, some simple questions about AACR...

for the uninitiated like me, some simple questions about AACR below if someone care to expand my knowledge
and explain it to me like a 5 year old :

1) will listed companies release the conference results/ data/ preso... when will this be done usually?

2) who in AARc have access to the embargoed presentations prior to release?

3) what is a "poster" and "poster presentation" exactly?

4) who attends AARC... just cancer researchers... or pharmaceutical co, buy side and sell side analysts?

5) was anything exciting and meaningful released in the 2018 AARC annual meeting?

thank you in anticipation