The images are loading slowly on the website. Sometimes, it takes 3s and sometimes around 6s to load an image of a size less than 1MB. Not sure, where the problem is as I am new to Netlify.
You’re loading 16 images at the same time at a total of 8.4MB. Depending on your internet connection (and possibly your location), that can take a while. It’s a bit faster here, but I’d recommend using a lazy loading technique nevertheless. Also check out https://tinyjpg.com/, it has some really good image optimization!