I will make complete web site or landing page at simple way
for Web Site
1-responsive interface
2-simple back-end
3-simple data analysis for your web (google analysis will be extra )
4- responsive design
5- simple contact form
6- site map to improve SEO
for landing page
1- very active landing page
2-back-end to control your page and add or remove features
3- data analysis (google analysis will be extra )
4- improve SEO