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Rohit Vaidya 3Rohit Vaidya 3 

Field lvl security.

How many ways the field level security is implemented in salesforce?
Arun Kumar 1141Arun Kumar 1141
Hello Rohit,

We can restrict fields by using field level security.There could be a scenerio where we want a user to have specific access or restriction on a field, there we can give read & edit permissions to the field. We can handle these field level permissions in three ways.

1. By using “set field level security” button at field level.
2. By using “view field accessibility” button at field level
3. In profiles/permission sets we can handle field level permissions.

For more details, you can check this:-
https://www.salesforcetutorial.com/field-level-security-salesforce-2/#:~:text=We%20can%20restrict%20fields%20by,level%20permissions%20in%20three%20ways.

Hope this will help you!

Thanks.
SwethaSwetha (Salesforce Developers) 
HI Rohit,
As mentioned in https://developer.salesforce.com/docs/atlas.en-us.securityImplGuide.meta/securityImplGuide/admin_fls.htm , 
You can define field-level security in either of these ways.
> For multiple fields on a single permission set or profile
> For a single field on all permission sets
> For a single field on all profiles

Related;
https://help.salesforce.com/s/articleView?id=sf.admin_fls.htm&type=5

If this information helps, please mark the answer as best. Thank you
Shuvam PatraShuvam Patra

Field-level security in Salesforce can be managed in three main ways:

  1. Profiles: Field permissions can be set in the profile associated with a user. Here, you can control the visibility of fields for a particular profile.
  2. Permission Sets: Permission sets allow you to extend users’ functional access without changing their profiles. If a user needs access to a specific field that is not available in their profile, a permission set is a flexible way to provide that access.
  3. Field Accessibility Settings: This is a tool in Salesforce setup that allows you to get a complete view of the field-level security settings. It lets you understand who can see and edit fields at a glance.

Both profiles and permission sets define the maximum access a user can have, but the most restrictive settings always win. So, even if a field is visible in the profile or permission set, it will still respect any restrictions set at the field-level security.