What type of keywords should I use to vary my anchor text?

[makoo]

What type of keywords should I use to vary my anchor text?

[Dynapro]

In general, it's still a best practice to obtain and use keyword- and topic-specific anchor text when possible. However, SEOs may get better results by striving for a variety of more natural anchor text phrases rather than the same keyword each time.

[chandrao7]

Anchor text is the clickable text in a hyperlink. SEO best practices dictate that anchor text be relevant to the page you're linking to, rather than generic text. The blue, underlined anchor text is the most common as it is the web standard, although it is possible to change the color and underlining through html code.

[jayam]

Keep it natural… and versatile. ...
Avoid over-optimization. ...
Keep anchors relevant to content. ...
Engage in relevant guest blogging. ...
Avoid links from and linking to spammy sites. ...
Distribute anchors in the right proportions. ...
Focus anchors on deep-level pages. ...
Place anchors where users pay the most attention.

[jayammrg]

Anchor text is "exact match" if it includes a keyword that mirrors the page that is being linked to. For example: 'link building' linking to a page about link building. Anchor text that includes a variation of the keyword on the linked-to page.