Use a search engine.
This is the most obvious option, but it can be difficult to find a song if you don't have much information to go on. Try searching for lyrics, a few words from the melody, or the genre of music. You can also try searching for the name of the album the song is on, if you know it.
Use a music recognition app.
There are a number of music recognition apps available that can help you identify a song by listening to a recording of it. Some popular music recognition apps include Shazam, SoundHound, and Musixmatch.
Ask for help on a music forum.
If you're still struggling to find a song, you can try asking for help on a music forum. There are many forums dedicated to music, and members are often willing to help identify songs.
Use a crowdsourcing platform.
Another option is to use a crowdsourcing platform like Reddit or Fiverr. You can post a request for help finding a song, and people will offer their suggestions.
Listen to the radio.
If you're lucky, you might hear the song you're looking for on the radio. If you do, you can use the Shazam app or another music recognition app to identify it.
Watch music videos.
If you know what the music video for the song looks like, you can try searching for it on YouTube or Vevo.
Ask a friend.
If you have a friend who is knowledgeable about music, ask them if they can help you find the song. They might be able to recognize it from your description or help you search for it online.