There are such a large number of abnormal state programming dialects out there. Extraordinarily JavaScript is a great programming dialect for making bots to play out a few tasks on the web. Presently a bot is essentially a code that gets things done for you. It can be anything.
Downloading records from web recursively
Brute forcing a login shape
Auto filling of structures and their accommodation.
Captcha innovation fundamentally keeps bots from getting to your site. It is to guarantee that a person is getting to your web. In security terms designers actualize this innovation to shield their destinations from DDOs and CSRF. 
This innovation is utilized for the most part to square spammers and bots that attempt to naturally get email delivers or endeavor to consequently agree to accept or make utilization of Web locales, sites or discussions. The acronym of 2captcha is Completely Automated Public Turing test to distinguish Computers and Humans One from the other.
The reason for a captcha is to prevent bots and virtual products from enlisting on the sites. The way a captcha is composed is coherent just by people and at present no AI has been created which can read them, consequently people will have the capacity to join while others can’t. Get to solve your CAPTCHAs by 2captcha only at http://deathbycaptcha.com.