To deposit your cryptoassets on Meria, simply create a deposit request on Meria and then deposit the cryptoassets on the wallet address you will be given,
Go to the "Invest" page
Click on the "Deposit" button for the relevant cryptoasset
Indicate the amount you want to transfer and the network you want to use
Confirm your request
Go to your account to retrieve the address
Copy and paste it into your wallet window ("recipient fields" in most cases).
Your deposit will then be assigned to your Meria account, and the funds will be automatically staked.