AB testing, in short terms is great for fine-tuning almost anything in a web page(from design items to content) and find out which ones converts the best. Instabir is one of this kind of plugins. Running on jQuery, this plugin helps you quickly implement AB testing with using just a few lines of code.
The plugin works by simply applying 2 different designs, content and other elements and hiding them and afterwards displaying only one of them randomly and records the activities into a MySQL database. A PHP file for handling requests and storing them into the database is provided and Instabir also provides a paid service which records all the activities itself and presents the results visually.
AB testing with jQuery