Does this page take information from my wallet?

No. It does not ask for a recovery phrase, a private key, or a password. The device stays with you.

Do you store what clients connect?

No. Nothing is saved on a server and no account is created. The page only shows the public address your wallet already returns, so balances can load.

What is this for?

A faster way to open the wallet you already have. Choose Ledger or Trezor, confirm on the device, and view the portfolio here.