If Mercmonk has enabled it, click ... More then Download file below the waveform. This is the best way to get a high-bitrate MP3.
If there is no official download button, many users turn to web-based tools. Be wary of intrusive ads and malware on these sites. Copy the URL of the Mercmonk video or track. Mercmonk Edit MP3 Download
Before downloading, always try to support the creator by using their official channels. This ensures you get the highest audio quality and the correct "edit." If Mercmonk has enabled it, click