Implicit wait vs Explicit wait vs Fluent wait

Implicit Wait
Webdriver will wait for given amount of time to locate the element before throwing "No Such Element Exception". If element located in less time selenium will skip remaining waiting time and start executing next step.

Syntax: driver.manage().timeouts().implicitlyWait(10,TimeUnit.SECONDS) ;

Explicit Wait
Webdriver will wait till condition match in given time.

Syntax:
WebDriverWait wait=new WebDriverWait(driver, 20);

Fluent wait
Webdriver will wait till condition match in given time, also it will check on regular interval as per mentioned in pollingEvery.

Syntax:
Wait wait = new FluentWait(WebDriver reference)
.withTimeout(timeout, SECONDS)
.pollingEvery(timeout, SECONDS)
.ignoring(Exception.class);