Most times, it is very important to have multiple or more than one certificate considering the way things are going.
What is a certificate? Certificate is a piece that is issue by an institution, organisation or a trade to certify that bearer has fully be trained and tested academically and he/she is fit to hold such certificate. For example, college of engineering and department of chemical engineering will issue a certificate to certify that the bearer has be tested, trained in design, chemical formulation and polymeric material before issuing such certificate to him and of course if the bearer go out, he can be able to put what he has been taught in school with or without supervision in carrying out any practical work base on his certificate.
In trade, same thing apply and that is instead going through higher institution for a particular period of time before the certificate can be issue, he will need to go through a training from a specialist or a professional for a period of time and of course after been trained practically, he can then set up business base on what he has been trained on. For example, if I'm to be issued a certificate of welding, I will need to enter a memorandum of understanding with the boss or the professional to trained me and after the particular time that I specified is complete, I will be issue with a certificate which can certify that I'm trained in such field and can work with or without supervision and the job will still be done
Now, the above are base on the fact that you are trained on just one field. The benefits of having a multiple certificate is that if assuming you study chemical engineering and you also study information technology, you will be giving two certificate and if for instance there is no job available for chemical engineering, you can use your information technology certificate to look for work and still get paid without any discrepancy. This is majorly the importance of having two certificate or multiple certificate. It is also very important to multitask just incase and it may interest you to note that if perhaps you cannot afford the finance of acquiring two certificate, you can as well take a short course or lea take a professional exam to boost your curriculum vitae and of course will make you stand out. Like for example in this pandemic period, most jobs have fold up and the fees once still operating are either operating remotely or from home and if apparently you don't have information communication technology certificate or skills, it will be very difficult for the company to retain such staff and these have also cause a lot of job losses around the world.
These are the major reason and of course it will be very important if you can go for your second certificate or a professional examination.
Information technology skills is a must skill one need to have now, to be relevant I the labour market