Hello,
Generally machines are trying to tell us something through logs, so they are very valuable resource to ensure that everything is working as expected and to give us an idea what is going on.
From information security perspective logs will help security professionals to quickly identify suspicious activities happening in the network to take quick actions and mitigate risks, security log sources are devices like firewalls, IPS, Antivirus, Windows AD, Endpoints (Desktops) and Proxy servers.
Analyzing and correlating logs provides visibility to network and security infrastructure which makes troubleshooting more easier and will allow monitoring teams to respond faster to incidents, and Splunk make this task easier than before as it acts as a search engine for all types of logs with very effective Search Processing Language (SPL)
Regards
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