When you just “claim”, you’ll receive your YFV tokens and a small amount of vUSD and vETH. The YFV token is the most actionable asset at the moment. You can take it to the YFV v2 stake pool and put it there to receive rewards of vETH and vUSD. vUSD and vETH are newly created tokens issued by the YFV devs. There really isn’t a market for them at the moment and everyone is pretty clueless at this point as to what the larger plan is for them. They’re “elastic” supply assets (see AMPL). I’m currently straining my brain trying to think of what the use-case would be for an elastic supply ETH… maybe it’s pointless, maybe it’s genius.
If you decide to quit farming, you’ll get your remaining YFV and vETH & vUSD AND your BPT tokens back. You can then take your BTP tokens back to balancer and redeem them for the tokens you originally staked. The number of tokens will probably be a little out of whack compared to what you originally put in due to “impermanent loss”. Best to read up on this topic before participating in liquidity pools – it’s important and can really screw you over if you’re not careful and mindful of what you’re getting into. That being said, the YFV pools are structured in such a way that mitigate this loss quite a bit since they’re mostly a 98% to 2% ratio. Pools that require, for instance, 50% ETH and 50% “SOME-OTHER-TOKEN” can really wreck you – even when the market is busting through the roof. Those are the times when it’s particularly painful: you get to see how well you would’ve done by just holding ETH vs. being a nice guy and providing liquidity.
Do lots of reading ask lots of questions. Farm a lilttle before you farm a lot. Find people in the space that you respect and have have good reputations and take cues from them. The more you can learn the better and it will set you up in the future to really be able to leverage this stuff to your extreme advantage.