"Hidden links and contents are not good for seo". Whether drop down menu affects seo. If yes any perfect solution for drop down menu with seo perspective?
drop down menus are not "hidden" in terms of SEO. If the drop down menu is rendered in standard HTML then any bot will be able to "see" it. Now, if you are using Javascript to create your drop down menu, that is a different story - most bots don't currently execute Javascript. From an SEO perspective, you may just want to make sure that the keywords you use in your drop down menu are appropriate for your site and the audience you are targeting. If they are not, then you may want to consider rendering the dropdown in Javascript. Hope this helps
Look at your page source. If your drop down menu is standard HTML with the links specified by <a href="...">
tags, then it's fine.
Google may not find the links if you use Javascript to generate the menu/links. Same goes if you use a <select>
element, which I've seen a lot.