Top 3 Metadata Terms in SharePoint

The following are the top three metadata terms in SharePoint:

• Taxonomy: Formal classification system that groups words, labels, and terms which describe something, and then arranges the groups into a hierarchy.
• Folksonomy: Informal classification system which evolves gradually as web site users collaborate on words, labels, and terms on a site.
• Term Set: Group of related terms. Term sets can have different scopes, depending on where one creates the term set.

Top 3 Important Features of SharePoint

The following are some of the top three features of SharePoint:

1. Create a SharePoint team site in seconds: One can create group-connected SharePoint team sites in seconds.
2. Customize the look of your SharePoint site: One can quickly and easily customize the look of the SharePoint site to reflect a professional style and brand. You can choose one of the default
3. Turn on and use external sharing: If one performs work that involves sharing documents or collaborating directly with vendors, clients, or customers, then one can utilize the external sharing features of SharePoint Online to share content with people outside an organization.

Top 3 Aspects of SharePoint Mesh

The following are the top 3 aspects of SharePoint Mesh:

1. Immersive Spaces in Teams: SharePoint Mesh allows users to create immersive spaces in Teams meetings. 
2. Custom Event and Template Creation: SharePoint and OneDrive can be utilized to create custom events and templates for Mesh.
3. Deployment Planning: Before deploying Mesh, it is important to gather the deployment team, verify licenses and policies.

Top 4 Average Formulas in SharePoint

The following are the top four average formulas in SharePoint:

1. Average of two columns: To calculate the average of two columns, use the following formula: =[Column1]+[Column2])/2.
2. Average of multiple columns: To calculate the average of multiple columns, use the following formula: =AVERAGE([Column1], [Column2], [Column3]).
3. Average of selected items: To calculate the average of selected items in a choice column, use the following formula: =AVERAGE([Choices]).
4. Average of a column with errors: To calculate the average of a column with errors, use the following formula: =IF(ISERROR([Column1]/[Column2]), "-", [Column1]/[Column2]).

Top 4 Count Formulas in SharePoint

The following are the top four count formulas in SharePoint:

1. Count: This formula counts the number of cells in a range that contains numbers.
2. Countif: This formula counts the number of cells in a range that meet a certain condition.
3. Sum: This formula adds up the values in a range of cells.
4. Average: This formula calculates the average of the values in a range of cells.

Top 4 External Web parts for SharePoint

The following are the top four external web parts for SharePoint:

1. Planner: Displays tasks and progress from team boards plans.
2. Twitter: Displays individual tweets and full feeds.
3. Office 365 Connectors: Used to embed information from 3rd party services such as Bitbucket, JIRA, and RSS.
4. Kindle Instant Preview: Used to reference an important Kindle book with one-click to preview or buy.

Top 3 Items About SharePoint Online Widths

The following are three key information items on SharePoint Online widths:

1. SharePoint Online uses a responsive grid system based on the Office UI Fabric The basic grid in the SharePoint desktop experiences is a 12-column structure.
2. In a communication site the max width listed as being 1204 px.
3. In a team site the max width is listed as being 1204 px.

Note: these aspects may vary based on your screen size, system and layout of the page.