»» The term "redesign" means recreating (partial or total) of the existing web pages.
»» This is the easiest option if you are not satisfied with the page layout, form or content, to bring information up to date or adding images conclusive.
»» Service & Maintenance update refers to maintaining a web page, updating the existing information and data, checking the elements functionality and the broken links, check uptime period (which you hosting / server), further optimization to improve navigation on the site and site traffic, continue keeping under observation for proper operation.