I've been on at least 100 websites and gone through them in great detail because I'm a copywriter looking for work.
I hope you don't make these mistakes on your website:
- Products described in very technical terms (some sound like they were written by engineers or lawyers). The end user needs to know if it will do a specific job and do it well they don't need to know how the product was designed or why. People want the benefit or the result not the feature!
- About Us pages - they tell their customers about the company owners and the president or whatever but... they don't explain why a person would choose their company. People want to know why they should choose you and your company from the hundreds of thousand of other companies on the internet
- Websites and pages that don't ask the person to contact them or buy from them - I know this sounds strange but if you don't ask people to contact you or buy from you they won't. They'll take the information you provide and go to someone who does ask.
- Hard to find order pages and contact pages. How easy is it for a person to find how to contact your or order your product? You should provide contact information or order information on every page.