What are the main, off-page activities in SEO?

Link Building is the main off-page SEO activity.

Brand Mentions.
Commenting.
Forums.
Influencer Outreach.
Guest Author.
Broken Link Building.
Social Networking.
Social Bookmarking.

Guest Posting
Forum Submission
Classifieds
Blog Commenting
Social Sharing

Commenting.
Forums.
Guest Author.
Broken Link Building.
Social Networking.
Social Bookmarking.

Main off-page activities in SEO

1. Creating valuable backlinks
2. Social Media Marketing
3. Guest Content
4. Forum Posting
5. Local Listings

Brand Mentions.
Commenting.
Forums.
Influencer Outreach.
Guest Author.
Broken Link Building.
Social Networking.
Social Bookmarking.

Directory Submission.
Social Bookmarking.
Blog Commenting.
Forum.
Classified Ads.
Blog Posting.
Article submission.

"Off-page SEO" (also called "off-site SEO") refers to actions taken outside of your own website to impact your rankings within search engine results pages (SERPs)​.

Blog Commenting
Forum
CA
Article Submission

Article Submission
Directory Submission.
Social Bookmarking.
Blog Commenting.
Forum.
Image Submission.

For most SEOs, content marketers, and bloggers, backlinks are the most important off-page SEO factor.

Creating backlinks is at the core of off-site SEO and is a technique that is crucial for any site with the aspiration of ranking on page one.

Off-Page is one of the best techniques in SEO. It helps us to gain quality and quantity traffic to the website or blog. As a result, this improves the ranking of the website in the search engine results pages. It includes the activity outside the website.
The best Off-page SEO activities are mentioned below.
Social Bookmarking
Directory Submission
Profile Creation
Classified Ads
Business listing
PPT Submission
Image Sharing
Info-graphics
Blog Commenting
Forum Posting
Guest posting

Creating valuable backlinks. Creating backlinks is at the core of off-site SEO and is a technique that is crucial for any site with the aspiration of ranking on page one. ...
Social Media Marketing. ...
Guest Content. ...
Forum Posting. ...
Local Listings.

The main off-page activities in SEO are backlinks.
There are different types of backlinks
1. Search engine submission
2. Ping submission
3. Bookmarking Submission and many more.

Guest Post, Social media marketing, Blog posting are the main off-page activities in SEO.

Off-Page SEO Activities

Brand Mentions.
Commenting.
Forums.
Influencer Outreach.
Guest Author.
Broken Link Building.
Social Networking.
Social Bookmarking

The main OFF-Page activities are;

Use Google My Business.
Profile Creation.
Creating Shareable Content.
Guest Post Submission.
Influencer Outreach.
Social Media Engagement.
Forum Submission.
Social Bookmarking.

Off-page SEO activities mainly include link building, social media marketing, influencer outreach, guest blogging, and online reputation management.

Off-page SEO refers to all the activity that takes place away from your website, which determines where you rank within the search engine results pages (SERPs). Optimising for off-site SEO ranking factors is crucial for improving the relevance, trustworthiness and authority of your website.