Factom blocks are 10 minutes long and similar to Bitcoin have different levels of confirmation. Without going into too much detail, when your transaction is successful, that means it was recognized but is not confirmed. Once the 10-minute block is over your transaction is confirmed.
Regular Factom explorers fetch only confirmed blocks, transactions, chains, and entries, so you had to wait from several to 10 minutes before seeing your freshly created chain, entry, or factoid transaction in explorer.
With Factom Realtime Explorer all chains, entries, and transactions are caught up within 1–2 seconds — that means you don’t need to wait for block confirmation, you can see or share your transactions or data entries instantly after submission to the network.