The phrase "to choose from on one's website" means that there are different options or things available for selection or consideration when browsing a specific person or company's website. Full definition
Nowadays, we're lucky to have a vast array of standardized options out there to choose from on the website technology side, including open source platforms like WordPress and Drupal and commercial products like Expression Engine. (epolitics.com)
Fortunately, you don't just need to use December writing prompts during December, since there are thousands to choose from on this website alone. (build-creative-writing-ideas.com)
I chose the white with gray but there are more color options to choose from on their website. (zdesignathome.com)