The buttons/arrows which users can use to move from slide to slide can be edited also within the settings. These can be edited to match your websites theme. An animation can be set for the slideshow. This is how the slides come into view. Most animations are a bit crazy and swirl into screen whereas some are more professional and come into view gently and appropriately for a professional website. To edit any text on the slideshow, just double click on any text. Buttons can be direct to other pages of the website or other websites, both using a URL/web address.
On WIX there is a wonderful SEO tool called SEO Wiz. It makes the basic steps of SEO even easier by offering you suggestions, such as keywords which relate to your website. Once you set your keywords the tool allows you to analyze the keywords. Have a mixture of short-tail and long-tail keywords, as long-tail keywords are easier to rank for. The tool then offers you an SEO plan, which will hopefully start to rank your website.
A perfect example would be a photographers portfolio website. They may have different pages for different types of photos such as nature, cars even maybe something small such as street signs. Having a car page would mean, no images of nature should be in the gallery of the car page, unless the photo over laps each category. Then the photo could be an exception.
First of all, you should know what your website will be about. This is the topic of your website. When starting to build a website WIX actually asks you this question, to suggest themes suitable towards your idea. You should also have an idea of what content is needed for the website. Is the website built on images, if it is a photography blog? Or/and, will you need an about page for example?