How we can create a profile in salesforce
https://www.youtube.com/watch?v=jvVgTdoE1Uk&t=6s
What is security in salesforce
https://www.youtube.com/watch?v=fiTRDkmxWs4&t=21s
Record Level Security in Salesforce
https://www.youtube.com/watch?v=FGs0NZ-sD_8&t=26s
Object Level Security in Salesforce-02
https://www.youtube.com/watch?v=9h_WdrLV9zk&t=26s
Field Level Security in Salesforce -03
https://www.youtube.com/watch?v=RBJXPcjinPM&t=17s