business owners can also optimize their business listings to gain greater visibility in Google Maps, through a type of search engine marketing called local search engine optimization. Indoor maps In March 2011, indoor maps were added to Google Maps, giving users the ability to navigate themselves within buildings such as airports, museums, shopping malls, big-box stores, universities, transit stations, and other public spaces (including underground facilities). Google encourages owners of public facilities to submit floor plans of their buildings in order to add them to the service. Map users can view different floors of a building or subway station by clicking on a level selector that is displayed near any structures which are mapped on multiple levels. My Maps My Maps is a feature in Google Maps launched in April 2007 that enables users to create custom maps for personal use or sharing. Users can add points, lines, shapes, notes and images on top of Google Maps using a WYSIWYG editor. An Android app for My Maps, initially released in March 2013 under the name Google Maps Engine Lite, was available until its removal from the Play Store in October 2021. Google Local Guides Google Local Guides is a volunteer program launched by Google Maps to enable its users to contribute to Google Maps when registered. Sometimes, it provides them additional perks and benefits for the work. Users can achieve Level 1 to 10, and be awarded with badges. The program is partially a successor to Google Map Maker as features from the former program became integrated into the website and app. The program consists of adding reviews, photos, basic information, and videos; and correcting information such as wheelchair accessibility.Adding reviews, photos, videos, new places, new roads or providing useful information gives points to the users. The level of users is upgraded when they get a certain amount of points. Starting with Level 4, a star is shown near the avatar of the user. Timelapse Earth Timelapse, released in April 2021, is a program in which users can see how the earth has been changed in the last 37 years. They combined the 15 million satellite images (roughly ten quadrillion pixels) to create the 35 global cloud-free Images for this program. Implementation As the user drags the map, the grid squares are downloaded from the server and inserted into the page. When a user searches for a business, the results