Which is the most important factor in link valuation?

In-bound links are needs of each website for driving traffics, improving link popularity and above all achieving nice search engine ranking. Link can be acquired by various means link exchange, link baiting, social media marketing and link buying ( non recommended method). Whatever the method you adopted for link acquisition but you need quality. Therefore [...]

What part of SEO process is most difficult?

SEO process involves various steps like keyword research, on page optimization, acquisition of inbound quality links also know as off page SEO, quality content development, measuring of success in term of ranking or return on investment etc. Each step has it own difficulty.