How to go about making sure all web viewers understand your site's purpose? Try to go straight to the point, and direct the readers on what to do next after reading your website. In some cases, you may need to show the readers what to do by providing them with the procedures.
The best and most effective method is to focus only on one objective, this way you can send a very simple and direct signal to your readers, and they can understand you very clearly. Take a squeeze page or an opt-in page for example, the objective is very simple and clear, you just want the readers to provide you with their name and email address. So just let them know all the benefits of opting into your list. Do not try to sell them anything or advice them to do any other things, just tell them to opt-in to your list.
Another example will be the sales page, let the readers know; the benefits of buying your product, if they don't, then they will be missing something important, and let them know that the copies are limited, to create an urgency for them to buy from you. The main objective is to promote your product, so do not add any other alternate suggestions, as these may distract them and diverts them away.
Most important of all, put yourself in the readers position, analyse the content, and see if it is delivering the correct message across. Try to get someone to read it first before publishing it, as you may not notice some of the mistake you have made.