Hello Launacs ,
I am Md Abdal and I would be glad to help you with your question.
When you split a database, you reorganize it into two files — a back-end database that contains the data tables, and a front-end database that contains all the other database objects such as queries, forms, and reports. Each user interacts with the data by using a local copy of the front-end database.
To split a database, you use the Database Splitter Wizard. After you split the database, you must distribute the front-end database to your users.
For more information please refer the below mentioned article.
https://support.microsoft.com/office/3015ad18-a3a1-4e9c-a7f3-51b1d73498cc
I hope this information helps.
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Kind Regards,
Md Abdal