What are the two type of sexual harassment?

According to the US Supreme Court, the 2 types of sexual harassment are the following:

• Quid Pro Quo - This occurs when the employee's submission or rejection of sexual advances or conduct made can explicitly or implicitly affect the conditions of one's employment or is used as basis for employment decisions made. This kind of sexual harassment is literally "this for that" and it means that the unwelcome sexual conduct can result to tangible employment action (such as hiring or firing) if the employee accepts or rejects such sexual requests or favor.

• Hostile work environment - This is a result of unwelcome conduct (whether verbal or physical) that is based on gender. Sexually harassing conduct that create a hostile environment may include the following: unnecessary touching, grant of job favors to employees who participate in consensual sexual activity, telling off-color jokes, use of demeaning or inappropriate teams, sabotaging the employee's work.

GENERALLY, courts look for SH claims to prove one of two types of SH:
quid pro quo - something for something - workplace favors in exchange for sexual favors, or

hostile environment - filling the workplace with insults and mistreatment [pervasive and persistent] based only on sex or gender.

After investigation, EEOC and state EEO agencies find only one validated SH charge per 200,000 US workers per year. Illegal sexual harassment is very rare.