By far the best search plugin

Fully configurable and compatible with the most popular themes and theme builders today. Allows you to insert it anywhere on the website, even via shortcodes. It searches absolutely the entire website (including CPT and ACF), and allows you to include or exclude any location. It allows multiple appearances, and you can choose between normal or Ajax searches (with no limit on the number of results). And if that weren’t enough, it allows all kinds of configurations via CSS in its own interface. I really can’t imagine a more complete search plugin. Kudos to the developers.