When your Garanti BBVA statement arrives as a scan or a photo of the page rather than a clean export, the numbers on it are just pixels until they are extracted. A scanned or photographed statement is still a picture of a table, the same as a digital original. The engine reads the image with OCR, locates the transaction rows and column positions, and pulls out every date, description, amount and balance figure it finds. Because the running balance is verified line by line against the statement's own printed closing balance, a misread digit that breaks the tally is caught immediately; you review the flagged row rather than discovering the error later in a reconciled ledger.
Whichever order your Garanti BBVA statement prints its columns in, each one still has to land in the right place once it reaches a spreadsheet. Column mapping gives you control over what lands where in the exported file. The engine identifies the statement's columns automatically, then lets you confirm or adjust the mapping: date to date, description to description, debit and credit to their respective columns, balance to balance. Once the mapping is set, the export writes a clean, structured file in Excel, CSV or QBO format, ready for import into your accounting system without further manual rework.