1 Introduction
MetaMask is an open source Ethereum wallet that helps users manage their Ethereum digital assets conveniently. At present, MetaMask has launched the Chinese version, and the official announcement said that it supports all DAPP applications on the market.
In addition to being a simple wallet, MetaMask also allows users to easily interact with Ethereum smart contracts, and even MetaMask can be used to participate in ICOs.
2. Installation steps
Use the Chrome browser to visit the MetaMask official website and click Download to download.
Download and install according to the client type. 
After clicking Install MetaMask for Chorme, it will jump to the Chrome Web Store, and then click Add to Chorme to install it. Or search for MetaMask
directly on the Chrome Web Store . After adding to Chrome, you will go to the following page, and then click to start using. The redirected page requires us to choose whether to create a wallet or import a wallet. If it is the first time to use it, we need to create a wallet. Before creating a wallet, there will be a warm reminder to remind us what to do. Then enter a password and click Create. Afterwards, an account mnemonic will be given, and the mnemonic must be backed up, preferably on paper. Then verify the mnemonic we just got. Finally, the wallet is created, and a number of "safety preservation tips" will be given at the same time. Click Done All to enter the main page.
3. Interface Introduction
3.1 Network selection
MetaMask provides Ethereum main network, Ropsten test network, Kovan test network, etc. Users can click "Ethereum main network" in the upper right corner to select and view. In addition, users can also customize RPC to connect to the network of other chains.
3.2 Account information
Click the avatar in the upper right corner to view account information, including creating an account, importing an account, connecting a hardware wallet, etc. Users can set it according to their needs.
3.3 Add Tokens
Below is the list of assets. We can add corresponding tokens according to our needs. Click the Add Token button to add.
For example, here we choose to add USDT, after searching, select and click Next, and finally click Add Token to complete the addition.
Below is the result after the addition is complete.
3.4 Get assets
If we are connected to the main network, we can transfer ETH to the wallet, or click to buy.
And when we access the Ropsten test network, we can obtain some virtual test ETH for use (only for testing, without any value).
First switch to the Ropsten test network, click the purchase button, and select "Get Ether" after testing the water pipe.
Click "request 1 ether from faucet" to get test tokens.
3.5 Transfer operation
Correspondingly, if you want to perform a transfer operation, you only need to click send, and then enter the address of the other party.
