Issue with huge loading time in our website

Dear Ones,

I need help finding out why our website takes a huge amount of time to load, is it because of the images? its expected for this website to have around 500+ of images in the near future and our team has implemented around 100+ and its getting very slow.

What i need help on is to find out:

– Why does it take so long to load?
– How can i fix this?
– Is it better to host those images later on in any CDN service?
– Do we need to implement something similar like WP Super Cache?

Thanks in advance for your support.

Your friendly one – The-geekeg