Great photos make you look more professional, attract more eyeballs and keep people around longer. They also help folks understand what your brand is all about and might even convince them to buy from or work with you.
On the flip side, if your pictures look strange or out of place, it can leave a bad impression and push people to leave.
I use stock photo site favourites Unsplash and Pexels to find your aesthetic.
Ask and you shall receive. No fuss.