Adding a web part to a SharePoint page is a fundamental skill for customizing and enhancing the functionality of your SharePoint sites. Web parts are reusable components that provide specific functionality, such as displaying lists, showing custom content, or integrating other services. Here's how you can add a web part to a SharePoint page:

Add a Web Part in SharePoint Online modern page

• Navigate to the SharePoint page where you want to add the web part.
• Click on Edit at the top right of the page. This will switch the page to edit mode, allowing you to modify its contents.
• Hover your mouse over the area where you want to add the web part. You'll see a plus (+) button, usually in a circle, which indicates that you can add a new web part there.
• Click on the plus (+) button to open the web part picker, which shows a list of available web parts.
  
• Browse or search for the web part you want to add. SharePoint Online offers a variety of web parts, such as Text, Image, Document Library, Quick Links, Microsoft Forms, and more.
• Click on the desired web part to select it. The web part will be added to your page at the selected location.
  
• Once the web part is added, you can configure it by clicking on any configuration icons or links that appear within the web part. For example, you might need to specify which list to display in a List web part or configure settings in a Microsoft Forms web part.
• Use the web part’s properties pane (usually appears on the right side) to customize settings like layout, content sources, and appearance.
  
• You can move the web part by dragging and dropping it to another part of the page.
• Some web parts allow resizing by dragging the edges to increase or decrease their size.
• After adding and configuring your web parts, click Publish at the top right to make the changes visible to all users. If you're not ready to publish, you can also click Save as draft to save your changes without making them public.

Additional Tips

· Responsive Design: Ensure that the web parts and their layout work well on different devices. SharePoint pages are responsive, but the arrangement of web parts can affect usability on mobile devices.

· Permissions: Be aware of content and data shown in web parts, as you might inadvertently expose sensitive information. Check permissions for content that web parts are displaying.

· Testing: After publishing, view the page as a regular user to ensure everything appears and functions as intended.

Add a Web Part in SharePoint Online classic page

· Go to your SharePoint site where you want the form to appear.

· Edit the page where you want to insert the webpart.

· Click on Add a Web Part to add a new web part.

· Choose the webpart that you want from the list. Select the Script Editor web part (or whatever webpart you want to add).

· Paste the link or embed code of your form.

· Publish or save the page to make the form visible to users. Here we have loading Microsoft form using iframe script in the script editor web part.

Adding web parts is crucial for tailoring SharePoint sites to meet specific business needs and enhancing user engagement.