Most important factor in SEO is to know about On-page optimization, Off-page optimization.
3.Anchor text tag.
9.Social media optimization.
**SEO Factor #1: Keyword near the beginning of the title tag.**
It can be enough to simply place the keyword in the title tag. It can be even better to have it at the beginning of it.
**SEO Factor #2: Keyword used as anchor text from external links.**
Inbound links from other domains that use your keyword as the anchor text are essential for SEO.
**SEO Factor #3: Authority of the domain.**
Google recognizes domains that have built a strong online presence and weighs their articles higher by default than others.
**SEO Factor #4: Genuinely high-quality, unique content.**
This SEO factor is vital. The key to success at your blog is to create awesome content that people enjoy.
**SEO Factor #5: Keyword anywhere in the domain name.**
Sites often rank well for the keywords that are contained in their domain name.
**SEO Factor #6: The number of external links to a page.**
Every link to a page is like a vote. The more links that your site gets, the more popular Google knows that your site is.
**SEO Factor #7: Keyword anywhere in an H1 tag.**
Google knows that the most important information on the page is in the heading tag. Take the time to make yours count.
**SEO Factor #8: Diversity of external link sources.**
It’s great to have a dozen links from another site. It’s even better to have one link each from a dozen sites.
**SEO Factor #9: Links from social media sources.**
Search engines pay attention when they see you creating content that your followers enjoy so much that they share it.
**SEO Factor #10: Keyword as anchor text to outbound links.**
Search engines like to see you linking to other relevant sites. Your keyword as the anchor text is a great way to do it.
**SEO Factor #11: Length of the remaining domain registration.**
Spammers often register domains for very short periods of time.
**SEO Factor #12: Keyword in the page URL.**
Google pays attention to sites with keywords in their permalinks. Make yours contain terms that describes the content of each article.
**SEO Factor #13: Keyword in smaller headlines like H2 – H6, Bold and Italics.**
Although these are less important than the H1 header tag, they are still very important.
**SEO Factor #14: The existence of a meta description for your page.**
Providing a meta description is a great way to show Googler’s what the page is about and draw them in to click your search listing.
**SEO Factor #15: Keyword as the alt text and title for an image.**
Using a key phrase as the alt text of an image is a tried and true way of earning better listings.