Evaluating a link to the website
Evaluation of a link must be made based on several factors, listed below.

How the site where you receive a link from must be:
Is the site indexed with one or more pages?
Does the site have a good authority?
Is the site reliable?
Does the site have fresh unique editorial content or not? Is the site updated periodically? Does the site contain relevant topic with the website you want to promote?

How the page of the website where you receive a link from must be:
Is the page indexed? Does the page have authority?
Is the page reliable?
Does the site contain relevant topic with the website you want to promote?
How many links does the page give to other sites (OBL)?
Does the page have hidden links?

Conditions for a good link:
Is the link text or image? Text links are better.
How the anchor text is? Does it seem natural or spam?
Where is the link located (site wide, footer or context)? The best links are placed in context.
What level from header is the link located?
Is the text link visible in a color that does not jump in the eye or the same as the site?
Is the link use a redirect script or is it direct and easy to index? Direct links are the ones you must get.

Link type analysis:
Is the link a text link or an image link?
How is your anchor text?
What percentage of anchor text exists?
Existing links: check each one whether it is natural or spam.
For new links: does the link seem spam?
Analysis of contextual conditions: the link must be positioned in the first paragraph of the article

What links are better for SEO?
Contextual or text links
GENERIC anchor text 33.3%
BRAND anchor text 33.3%
TARGET anchor text 33.3% Quality links from niche websites (portals, link from a forum topic that is relevant with the website)
Links from relevant sites with similar topic Contextual links from a blog article
Exchange links only 3 way without the main site to give back link
Image links, banners from related websites
Links from local authority sites (Local directories) Links to websites web 2.0, web 2.1, social media link
Links from social bookmarking sites Romanian and foreign
Wiki links
Links to informative sites
Best links are incoming links from sites with original content, which get natural links and social signals.