If you want to view the details of the transaction, you can search for it (using the transaction id or sending or receiving address) on a block explorer website such as blockchain.info.

Once you have an understanding of the fee paid, in satoshi's per byte, you can see where that fits in the backlog of transactions, using a site that analyses unconfirmed transactions and their fees, like Johoe's Mempool Statistics

Further details on what to do are available on the canonical question about unconfirmed transactions.