Phishing is a scenario where a threat actor pretends to be someone they're not, so a person will send them useful information.
Spear phishing is a type of phishing where the threat actor targets a specific person, using legitimate personal or business information gathered by other means to create false credibility.
Read more about phishing: https://cyber.gc.ca/en/guidance/dont-take-bait-recognize-and-avoid-phishing-attacks