The first is website load time. Not only is site load time a ranking factor in terms of when it comes to search engines but a faster site is going to be better for your users and ultimately lead to more conversions. Your users aren’t likely to stay on a site that takes longer than a few seconds to load.
The next is having a mobile friendly website. Mobile friendly sites have started ranking higher in search engine results. Having a responsive or even mobile specific site is very important.
Finally, while tools like JavaScript and Flash are great for presenting information in a very interactive and unique way, you want to make sure your developer doesn’t put any important content within those elements. Having contents within JavaScript makes it very difficult for search engines to read and therefore you’re not going to receive any of the ranking placements.
Contact Company 119 if you are looking for a website that has been developed with Search Engine Optimization in mind.