How I can remove header space of my website

Please share a snap and HTML code. so that someone can review and suggest required css / html change.

Please share with snap about how much space you want to reduce. I can provide the required css for your case. Regarding performance, you can check with below shared site by @sachin.

Sachin Singh5y ago

The two main reasons of a slow loading website are

Too many Javascript and CSS request (means if someone open your site then 10 request goes behind the scene)
Large size and unoptimized images/videos.

this is the GtMatrix score of your website which is obviously too poor. also see you have to work on first 6 recommendations.