Recently,I found my site(wholesale-dress.net) indexed number by google decrease a lot, about 20% of last indexed number. How that happened? BTW, if I want my product page has high Gross exposure and keywords ranking in SERP, what should I do? Should I focus on the website structure, for I think a website's structure do important effect on page Gross exposure and ranking.
Usually, indexing is the result of 2 factors: How often googlebot access your site and how easy it can browse in your site.
There are over 200+ aspects involved to get your ranking high in SERP. I suggest you to do proper onsite SEO before going after link building campaign.
onsite SEO? I thought too. And now I am considering what kind of SEO strategy should be used in my website
I think it is important to make sure that your website is updated on a regular basis so that Google spiders remain on your site and index content regularly. Also, the content is the most important factor and hence the content should be unique and useful.
According to me first you have to design ur website which must be user friendly and search engine friendly, and make the correction in on page properly and then start off page i a right manner, try to cache your webpage in a regular interval.
Do proper On Page Seo...and make some change in meta tags or update a content ....because the content is the king.Make some changes in your website at regular interval so that spider will crawl your site at regular basics.