Conditional Mood (Le conditionnel)
Subjunctive: express desires, doubts, the unknown, the abstract, and emotions
Indicative: express actions, events, and states that are believed to be true and concrete
Conditional: describe events that are not guaranteed to occur; often they are dependent on certain conditions

Si clauses, also known as conditionals or conditional sentences, are if-then constructions that express a condition to be met in order for a certain result.
They are divided into three types, depending on whether the condition is
likely,
unlikely, or
impossible
lawlessfrench.com

The Si (If) Clause
The conditional in intentional expressions

The Essential Guide to the French Conditional Tense fluentu.com

Conditional Sentences cliffnotes.com

Verbs
Elements of Grammar