How do you know exactly what you want your website to do? If you've done the planning stage, you'll have a reasonable idea and that will give you the 'clues' as to what to do next. Do you want an online store, do you want to build your mailing list, do you want a simple contact form or perhaps some way for your customers to be able to ask for pricing information or something else. We'll cover the basics here, and point you in the right direction for the rest!
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