how to use check on a on_message discord.py code example

Example 1: how to check if a message includes a word discord.py

@bot.event
async def on_message(msg):
    if 'word' in msg.content:
        print('Keyword found')
        # Do stuff here

Example 2: on message discord py

@bot.event
async def on_message(message):
    if message.content == "pong":
        await message.channel.send('ping')