You may have spent a lot of time and money on your website content, making sure that it not only reads well and should attract potential customers, but also that it has not punctuation or spelling mistakes. When creating call to actions or online adverts, regardless of if they will be on your site or another site, you should ensure that they are written correctly. Small spelling mistakes or mistakes with email address or phone numbers can cost you enquiries or sale and have the opposite effect of what you were looking for.

If you have had a designer or marketing company create the ads for you, although they should of checked them it is worth checking them again. If you have designed the adverts or call to action banners then you may find that you miss read the mistakes and your mind corrects them so asking someone else to take a glance over it can often highlight any issues quickly.

Ideally this should be done before they go live, but if you do notice a mistake once love the beauty of the web is it can usually very quickly be changed.