well, we are going to have some problems like

• redundant info
• not proper ability to update, delete, insert, e.t.c. data
• more disk space and database space
• not accurate answers of queries
• and more

(google says )

Without normalization, database systems can be inaccurate, slow, and inefficient and they might not produce the data you expect. We use the normalization process to design efficient and functional databases. By normalizing, we store data where it logically and uniquely belongs.