60-Second Syntax is a quick look at some common mistakes in writing. Please note: Different editors may follow different styles and rules.
Generally speaking, affect is a verb and effect is a noun.
Affect means to influence.
Effect means outcome or result.
Effect can also be a verb meaning to make happen.
Example: His speech on gun control may affect the voters’ choice.
Cancer can be an effect of smoking.
The law effected a change in public policy.