Raw tables provide you raw, unfiltered and unedited data.
Raw data tables are very useful to get raw scripts, inputs, and outputs from transactions.
Bitcoin uses a UTXO transaction model, and has a heavy focus on signatures and scripts for "locking" and "unlocking" tokens. They are also most well known for being tied to a 21 million token supply, and halvenings. For a full guide on all Bitcoin concepts, check out this one.