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.
The basics of SEO are very important to comply with. They help search engines understand your website and what it is about. Using algorithms search engines will then rank your site appropriately to specific searches. Ideally you want your site to be on the first page of a search, which can be very hard. Generally the basics of SEO does not achieve first page ranking as it requires a bit of work and effort to do so.