If i want record level access then what should i use from Salesforce security model

If i want record level access then what should i use from Salesforce security model

Manual Sharing –> there will be sharing button in the record near by edit, cancel etc

The Sharing button is available when your sharing model is either Private or Public Read Only for a type of record or related record. For example, the Sharing button may appear on an account even though your sharing model for accounts is Public Read/Write if your sharing model for related opportunities is Public Read Only.