In cryptocurrency token is composing of different coin. if you are joined on bounty campaign or participating airdrop they give you back token as your rewards for your participation and the equivalent of this is coin.

Yes thats good but you always need to be active in bitcointalk or you'll miss the airdrop. Just like he mention that you need to fill a form in order to get the tokens they share.

Tokens is actually a payment to any participants in a particular campaign or ICO. It is created by many developers and the name of coin is based also on the campaign name and this coins is being sale and this is actually offered by a signature campaign. Many investors can buy it and then they will hold it for more income.

A token is a special frame that is passed from node to node around a ring network. When it gets to a node that needs to transmit data, the node changes the token into a data frame and transmits it to the recipient. 
A token is essential to the inner workings of a token ring network.
Techopedia explains Token
The token can only be handled by a single node at a time. The bearer of the token is the only one allowed to send data around the network to a recipient node within the network. The bearer of the token writes the address of the recipient and the data to be sent, and then sends it to the next node in the series.
When the sender node sends the token to the next node, that node reads the address. If that node is not the intended recipient, it sends the data to the next node and so on. Finally, when the recipient node reads the data and knows that it is the recipient, it takes the data and sends the token back to the the sender's address with a message indicating that the data was received. The token is then sent around the ring again until it reaches the sender/bearer of the token. After using the token, a node releases it back into the network so other nodes will be able to use it.
Although token ring transmission seems to be a slow process, users rarely notice it because data communication occurs rapidly.

Tokens is the terms use in any ICO projects in the promotion of certain project being launched inthe internet, the tokens which is made for that kind of project are been sold to thosr who invest in that certain ICOs , while those are been offered to join the campaign of that project will also be given the same token as in the presell of tokens and after the project will be successful the bounty campaigner will be given this tokens.

A token is a special frame that is passed from node to node around a ring network. It is communicating to other computers and devices on the network. It is often refers to a position of a much larger piece of data. A token can only be handled by a single node at a time.

I think everythings has been said already and i have nothing to add on,what i can make is an advice,that you must be aware about airdrops because more than legit is a scammer,more of them are just getting our email and use to add on their social media sites that they can use as campaign materials for some projects.

For you to understand, it simply a cash share by doing a simple task by the ICO(you can sa it a "company"). How to receive that thing? By doing airdrop and bounty. As what I said above, it only requires a simple activity.

As far I know and maybe I am wrong, token usually using ethereum network and token always have smart contract. Token have their own platform for they purpose but they use ethereum blockchain.

So token are native to each blockchain. They are used to secure the network by incentivization of the participants. Tokens can take up any form >>it can be equity, asset, currency within the network. In it’s simplest terms, its just a unit of value in the blockchain. Thus Only permissionless ledgers (public Blockchains like Bitcoin or Ethereum), need some sort of incentive mechanism to guarantee that block validators do their job according to the predefined rules

I have a read an great article on this. the link is https://blockchainhub.net/tokens/

Please read and enjoy