What can I do on Linea?
You can send, receive, bridge tokens along with interact with all the dapps listed on our page here: Ecosystem | Linea If you are a developer and would like to build on Linea, you can check out our docs here: Building on Linea | Linea
Why are my transactions so slow?
The system is configured with a limit on data-availability that we can process on Linea to contain L1 fees needed to hold L2 data and zkProof.
We reached this limit due to impressive network activity.
We are going to increase it.
We will increase it further if necessary. 
What can I do with my pending transaction?
For your pending transaction, you can either wait, speed up, or cancel. If you have multiple pending transactions, please cancel the oldest pending transaction.
Please understand that transactions can be slow at the moment on the testnet.
Here is more information on the MetaMask Knowledge Base