Software as a Service (SaaS) is a software delivery model where a third-party provider hosts applications that can be accessed by users over the internet. Instead of installing software on local computers or servers, users can access SaaS applications using a web browser or app. The provider is responsible for hosting the software, handling maintenance and updates, and ensuring data security.

SaaS is typically offered on a subscription basis, where users pay a recurring fee to access the software. This pricing model can provide cost savings for businesses, as they do not need to invest in hardware or IT infrastructure to host the software. Additionally, SaaS providers often offer flexible pricing options based on the number of users or features needed, allowing businesses to scale their software usage as their needs change.

One of the key benefits of SaaS is its flexibility and scalability. Users can access the software from anywhere with an internet connection, making it ideal for remote work or collaboration. SaaS providers also typically offer frequent updates and new features, which can be automatically added to the software without requiring manual updates or installations.

However, there are also some potential drawbacks to using SaaS. Users are reliant on the provider to maintain and secure the software and data, which can be a concern for some businesses. Additionally, there may be limited customisation options available compared to locally installed software.

Overall, SaaS is a popular software delivery model for businesses due to its flexibility, scalability, and cost savings. By allowing businesses to access software over the internet, SaaS providers can offer a wide range of applications that are easily accessible and frequently updated.