Subjunctive Present
The Subjunctive Present tense can be translated as expressing possibility or uncertainty (may). Especially when it follows: quizás (perhaps), tal vez (maybe), capaz (capable).

Subjunctive Present is also used as: Commands

Subjunctive vs. Indicative
The main difference between Subjunctive and Indicative is:

Subjunctive = possibility/subjectivity
Indicative = certainty/objectivity

Example (Subjunctive):
El doctor le recomendó que coma más verduras.
The doctor recommended that he eat more greens.