multicall is a powerful tool to perform multiple actions in one transaction - instead of having to make multiple requests. However it can be a bit confusing to set up. Below are some examples:

import {
  encode,
  getContract,
  prepareContractCall,
  prepareTransaction,
  sendAndConfirmTransaction,
} from "thirdweb";

// Init ERC-721 contract
const contract = getContract({
  chain: yourChain,
  address: "your-contract-address",
});
const rawTxs = addresses.map((address) =>
  prepareContractCall({
    contract: contract,
    method: "function balanceOf(address owner) view returns (uint256)",
    params: [address],
  })
);
const encodedTxs = await Promise.all(rawTxs.map((tx) => encode(tx)));
const multiCallTransaction = multicall({ contract, data: [encodedTxs] });
const data = await sendAndConfirmTransaction({
  transaction: multiCallTransaction,
  account: yourAccount,
});