There are two ways to include jQuery in our project:
1. Online Mode: We can add jQuery into our project directly by using a CDN such as Google, Microsoft.
2. Offline Mode: We can download the jQuery library from the CDN and then include it in our project.
Note: CDN is Content Delivery Network and it host the jQuery libraries online. Most popular CDNs are Google, Microsoft. If is always a good practice to use the CDN hosted jQuery in project instead of the offline one.