The /blocks page will display all synchronized blocks, with basic details such as mining timestamp or the number of transactions. Block numbers link to the block details page If a block is mined but the CLI is not listening, the block won't appear here.
Each block has its own page, with the URL following the pattern
Transactions contained in this block are all displayed. If a transaction is a contract call and artifacts have been uploaded, clicking on it will decode the data. You'll be able to see:
Function call signature with the parameters
Watched variables data
The watched variables data will be the one watched for the contract called in the transaction.