Malware removal software is an important part of the armory of tools that can be used to defend your PC from being compromised by a malicious payload of one kind or another.
As with an antivirus app, when installed on your machine, a piece of anti-malware software will give you the ability to scan the system to check if any malware is present.
There’ll be a ‘Scan’ button on the main menu of the app (most likely, or a submenu perhaps), and simply clicking on that will scan your drive(s) and memory. Just the same as with an antivirus, the malware removal tool will have (regularly updated) definitions of common malware. It’ll look for matches based on the content of this library of definitions, and if anything is found on your PC, that will (obviously) be flagged as malicious.
Malware removal software can give you more than just on-demand scanning, though, and some apps offer real-time defenses in the same vein as an antivirus. Real-time protection simply means that the anti-malware tool has a constant shield up, scrutinizing every file being introduced onto your system (and the processes currently running) for anything suspicious.
Remember that anti-malware is built to major in such behavioral detection, and finding fresh threats that an antivirus might miss. You also get web defenses (against phishing and other online scams) for safer browsing, plus anti-ransomware tech – a broader level of protection, in other words, from the paid Malwarebytes app (as you might expect).