Hearthpwn

could someone simply explain because I have seen a lot of players advice not to play any card against druid in turn 1

Against druid?  No idea.  There needs to be more context.

It's not always right to play an overly-small minion first turn against Priest.  The issue is that if they play Northshire Cleric and you don't have a good way to remove it, they may end up drawing cards, but that also depends a lot on the deck you're playing against that priest.  For example, if I had Firefly in a slower deck (I think a lot of Recruit Hunters will toss in Firefly to keep from getting too far behind), to fight for early tempo, I might not want to play it into a priest if I didn't have follow-up.  In a faster deck like Odd Rogue, you could easily follow up with a weapon and clear the cleric.

Perhaps a 1 health minion because of Wrath?  Even then doesnt make sense.

Where did you hear this? Please give an example

Quote from gazarika >>

could someone simply explain because I have seen a lot of players advice not to play any card against druid in turn 1

WTF? Could you be more specific about who said that? I have never read, nor listen, such a thing.

Quote from gazarika >>

could someone simply explain because I have seen a lot of players advice not to play any card against druid in turn 1

 Maybe it was a brawl specific advice. 

Never heard this before.  You got bad advice from someone.

good advise- druid players

probably in evenlock to get a giant early (?)

that makes very little sense.

Against Priest maybe, because of NOrthshire, but Druid doesn't have a card that punishes 1-drops. Even if you'd account for Wrath, most Druids will probably Wild Growth Turn 2, so it doesn't matter.

if it's needed for a combo later or you will get more value holding it keep it in your hand, thats true for all classes