Definition of Logarithm
Let 𝑏 and 𝑦 be the positive numbers with 𝑏≠1.
log𝑏𝑦=𝑥 if and only if 𝑏𝑥=𝑦 
When you see log𝑏𝑦, you should read it out loud as "log base 𝑏 of 𝑦"
When you see log𝑏𝑦, you should think in your head "𝑏 to what power makes 𝑦?"