This is the first thing users read when visiting your site. A good practice is to keep it 4-7 words that briefly describes what you do. If you're a local service business you might want to include your location in the headline for SEO purposes. Don't try to be fancy or unique. Make it clear what your business does.
Ideally this will be placed below the headline. Depending on what action you want visitors to take, here are some good ones you can use:
Including your best testimonials from customers will show that you know what you're doing or that your product works.
Users don't want to spend their time on your site trying to figure out how to navigate it. Keep it clear and simple. Make sure it is responsive across all screen sizes.
Some businesses use full-screen sized images in heir hero section which is a nice way to enhance the look and feel of the site. However, if these images are low quality or pixelated, it will reverse the effect and make it look cheap and unprofessional. Make sure images are good quality and use free online tools such as www.freeconvert.com to convert images to webp format.