Enabling ICMP through ASA Firewalls

[Drader]

Hello, I am new to networking and was wondering if anyone can tell me what is the difference (like in what situation will I need to use them) amongst the following commands for cisco ASA:

1. inspect icmp - for policy-map global_policy

2. access-list icmp extended permit icmp any any (and using access group after)

3. fixup protocol icmp

Thank you in advance!

[Kasun Bandara]

1st and 3rd commands using to inform firewall to treat ICMP traffic as a statefull way. 2nd command is allowing ICMP traffic using ACL applied to respect direction and interface.